Boromir, Warden of the Tower
Possibility Storm

   Prerequisites

What do I need to start this combo?
Boromir and Possibility Storm on the battlefield.

   Steps

How does this combo work?
1
Whenever a player casts a spell from their hand, Possibility Storm triggers, exiling the spell and allowing the player to reveal cards from the top of their library until they reveal a spell that shares a type with the exiled spell, and cast it without paying its mana cost.
2
If the player chooses to cast the spell, Boromir triggers, countering that spell since no mana was spent to cast it.

   Results

What do I get from this combo?
Counter all spells players cast from their hands
Lock
Winota, Joiner of Forces
0.8%inclusion100 decks12.8K decks
Rocco, Street Chef
0.6%inclusion74 decks12.2K decks
Queen Kayla bin-Kroog
1.2%inclusion25 decks2.13K decks
The War Doctor // Clara Oswald
2.0%inclusion25 decks1.26K decks
Pramikon, Sky Rampart
0.3%inclusion17 decks6.76K decks
Zedruu the Greathearted
0.1%inclusion12 decks11.5K decks
Aragorn, the Uniter
0.0%inclusion9 decks21.3K decks
Kenrith, the Returned King
0.0%inclusion9 decks30.1K decks
Pia Nalaar, Consul of Revival
0.3%inclusion8 decks2.92K decks
Kaalia of the Vast
0.0%inclusion8 decks37.1K decks
Rocco, Cabaretti Caterer
0.1%inclusion8 decks8.88K decks
Arabella, Abandoned Doll
0.0%inclusion7 decks20.1K decks
The War Doctor // Adric, Mathematical Genius
4.3%inclusion7 decks161 decks
Ardenn, Intrepid Archaeologist // Rograkh, Son of Rohgahh
0.1%inclusion6 decks7.98K decks
The War Doctor // K-9, Mark I
1.4%inclusion6 decks430 decks
Dihada, Binder of Wills
0.1%inclusion6 decks10.7K decks
Bruse Tarl, Boorish Herder // Kamahl, Heart of Krosa
1.6%inclusion6 decks369 decks
Jetmir, Nexus of Revels
0.1%inclusion6 decks9.64K decks
New Cards
Yavimaya Bloomsage
5.3%inclusion1 decks19 decks
Studious First-Year
5.3%inclusion1 decks19 decks
Scorched Geyser
4.8%inclusion1 decks21 decks
Prismari, the Inspiration
4.8%inclusion1 decks21 decks
Improvisation Capstone
4.3%inclusion3 decks69 decks
High Synergy Cards
Lavinia, Azorius Renegade
60%inclusion99 decks165 decks
Archon of Emeria
41%inclusion227 decks550 decks
Eidolon of Rhetoric
35%inclusion190 decks550 decks
Deafening Silence
34%inclusion188 decks550 decks
Esper Sentinel
50%inclusion273 decks550 decks
Night of the Sweets' Revenge
32%inclusion58 decks179 decks
Aven Mindcensor
33%inclusion180 decks550 decks
Grand Abolisher
38%inclusion211 decks550 decks
Knowledge Pool
29%inclusion159 decks550 decks
Jaheira, Friend of the Forest
31%inclusion56 decks179 decks
Top Cards
Swords to Plowshares
63%inclusion348 decks550 decks
Birds of Paradise
48%inclusion86 decks179 decks
Path to Exile
47%inclusion260 decks550 decks
Mystic Remora
42%inclusion69 decks165 decks
Delighted Halfling
36%inclusion64 decks179 decks
Dark Ritual
36%inclusion42 decks118 decks
Annie Joins Up
35%inclusion63 decks179 decks
Dauthi Voidwalker
34%inclusion40 decks118 decks
Deflecting Swat
34%inclusion185 decks550 decks
Teferi, Time Raveler
33%inclusion55 decks165 decks
Game Changers
Drannith Magistrate
59%inclusion323 decks550 decks
Demonic Tutor
52%inclusion61 decks118 decks
Opposition Agent
49%inclusion58 decks118 decks
Vampiric Tutor
47%inclusion56 decks118 decks
Rhystic Study
47%inclusion77 decks165 decks
Enlightened Tutor
41%inclusion224 decks550 decks
Imperial Seal
32%inclusion38 decks118 decks
Orcish Bowmasters
31%inclusion37 decks118 decks
Ancient Tomb
27%inclusion149 decks550 decks
Chrome Mox
22%inclusion123 decks550 decks
Creatures
Ignoble Hierarch
31%inclusion16 decks51 decks
Lotho, Corrupt Shirriff
29%inclusion34 decks118 decks
Noble Hierarch
27%inclusion17 decks62 decks
Avacyn's Pilgrim
27%inclusion49 decks179 decks
Ragavan, Nimble Pilferer
27%inclusion149 decks550 decks
Ethersworn Canonist
27%inclusion148 decks550 decks
Kami of Whispered Hopes
27%inclusion48 decks179 decks
Peregrin Took
26%inclusion47 decks179 decks
Bloom Tender
26%inclusion47 decks179 decks
Kutzil, Malamet Exemplar
26%inclusion46 decks179 decks
Professional Face-Breaker
25%inclusion139 decks550 decks
Thalia, Guardian of Thraben
24%inclusion131 decks550 decks
Imperial Recruiter
23%inclusion129 decks550 decks
Baylen, the Haymaker
23%inclusion39 decks170 decks
Samwise Gamgee
23%inclusion41 decks179 decks
Ranger-Captain of Eos
23%inclusion124 decks550 decks
Archivist of Oghma
23%inclusion124 decks550 decks
Voice of Victory
22%inclusion82 decks373 decks
Talion, the Kindly Lord
22%inclusion12 decks55 decks
Faldorn, Dread Wolf Herald
22%inclusion39 decks179 decks
Deathrite Shaman
22%inclusion11 decks51 decks
Gilded Goose
21%inclusion38 decks179 decks
Incubation Druid
21%inclusion38 decks179 decks
Etali, Primal Conqueror
21%inclusion38 decks179 decks
Soulless Jailer
21%inclusion113 decks550 decks
Combat Celebrant
21%inclusion113 decks550 decks
Mother of Runes
21%inclusion113 decks550 decks
Drana and Linvala
20%inclusion24 decks118 decks
Magus of the Moon
20%inclusion111 decks550 decks
Spirit of the Labyrinth
20%inclusion109 decks550 decks
Aven Interrupter
19%inclusion105 decks550 decks
Elvish Mystic
18%inclusion33 decks179 decks
Basking Broodscale
18%inclusion32 decks179 decks
Llanowar Elves
18%inclusion32 decks179 decks
Thalia, Heretic Cathar
17%inclusion96 decks550 decks
Blade Historian
17%inclusion93 decks550 decks
Simian Spirit Guide
17%inclusion93 decks550 decks
Collector Ouphe
17%inclusion30 decks179 decks
Faeburrow Elder
16%inclusion29 decks179 decks
Dauntless Dismantler
16%inclusion89 decks550 decks
Ornithopter of Paradise
16%inclusion88 decks550 decks
Evolution Witness
16%inclusion28 decks179 decks
Loyal Apprentice
16%inclusion86 decks550 decks
Witch Enchanter
15%inclusion85 decks550 decks
Legion Warboss
15%inclusion83 decks550 decks
Recruiter of the Guard
15%inclusion83 decks550 decks
Giver of Runes
15%inclusion82 decks550 decks
Grand Arbiter Augustin IV
15%inclusion24 decks165 decks
Skrelv, Defector Mite
14%inclusion79 decks550 decks
Urabrask, Heretic Praetor
14%inclusion78 decks550 decks
Instants
Cyclonic Rift
32%inclusion53 decks165 decks
Fierce Guardianship
32%inclusion52 decks165 decks
Silence
26%inclusion143 decks550 decks
Worldly Tutor
25%inclusion44 decks179 decks
An Offer You Can't Refuse
24%inclusion40 decks165 decks
Tainted Pact
22%inclusion26 decks118 decks
Deadly Rollick
22%inclusion26 decks118 decks
Force of Will
21%inclusion35 decks165 decks
Dovin's Veto
21%inclusion35 decks165 decks
Heroic Intervention
21%inclusion37 decks179 decks
Swan Song
20%inclusion33 decks165 decks
Counterspell
20%inclusion33 decks165 decks
Force of Negation
19%inclusion32 decks165 decks
Beast Within
19%inclusion34 decks179 decks
Eladamri's Call
18%inclusion33 decks179 decks
Red Elemental Blast
18%inclusion97 decks550 decks
Teferi's Protection
18%inclusion97 decks550 decks
Chaos Warp
17%inclusion96 decks550 decks
Mystical Tutor
17%inclusion28 decks165 decks
Anguished Unmaking
17%inclusion20 decks118 decks
Pyroblast
17%inclusion93 decks550 decks
Mana Drain
16%inclusion27 decks165 decks
Abrupt Decay
16%inclusion8 decks51 decks
Inspiring Call
16%inclusion28 decks179 decks
Generous Gift
15%inclusion85 decks550 decks
Boros Charm
15%inclusion83 decks550 decks
Flawless Maneuver
15%inclusion82 decks550 decks
Tibalt's Trickery
15%inclusion80 decks550 decks
Mindbreak Trap
15%inclusion24 decks165 decks
Mental Misstep
15%inclusion24 decks165 decks
Flusterstorm
15%inclusion24 decks165 decks
Arcane Denial
15%inclusion24 decks165 decks
Guff Rewrites History
12%inclusion67 decks550 decks
Brainstorm
12%inclusion20 decks165 decks
Assassin's Trophy
12%inclusion6 decks51 decks
Flare of Fortitude
12%inclusion64 decks550 decks
Pact of Negation
11%inclusion18 decks165 decks
Sink into Stupor
10%inclusion16 decks165 decks
Crop Rotation
9.5%inclusion17 decks179 decks
Brain Freeze
9.1%inclusion15 decks165 decks
Abrade
9.1%inclusion50 decks550 decks
Negate
9.1%inclusion15 decks165 decks
Chord of Calling
8.9%inclusion16 decks179 decks
Delayed Blast Fireball
8.9%inclusion49 decks550 decks
Rampage of the Clans
8.4%inclusion15 decks179 decks
Growth Spiral
8.1%inclusion5 decks62 decks
Reprieve
8.0%inclusion44 decks550 decks
Zoyowa's Justice
7.8%inclusion43 decks550 decks
Orim's Chant
7.6%inclusion42 decks550 decks
Wear // Tear
7.6%inclusion42 decks550 decks
Sorceries
Nature's Lore
31%inclusion55 decks179 decks
Farseek
31%inclusion55 decks179 decks
Three Visits
28%inclusion50 decks179 decks
Jeska's Will
22%inclusion123 decks550 decks
Rampant Growth
21%inclusion38 decks179 decks
Diabolic Intent
19%inclusion23 decks118 decks
Gamble
19%inclusion107 decks550 decks
Toxic Deluge
19%inclusion22 decks118 decks
Blasphemous Act
17%inclusion91 decks550 decks
Cultivate
16%inclusion29 decks179 decks
Windfall
16%inclusion26 decks165 decks
Beseech the Mirror
15%inclusion18 decks118 decks
Ruinous Ultimatum
15%inclusion18 decks118 decks
Supreme Verdict
15%inclusion24 decks165 decks
Farewell
14%inclusion78 decks550 decks
Grim Tutor
14%inclusion16 decks118 decks
Sevinne's Reclamation
13%inclusion73 decks550 decks
Escape to the Wilds
12%inclusion22 decks179 decks
Idyllic Tutor
10%inclusion55 decks550 decks
Finale of Devastation
9.5%inclusion17 decks179 decks
Kodama's Reach
9.5%inclusion17 decks179 decks
Avatar's Wrath
9.4%inclusion19 decks203 decks
Fractured Identity
9.1%inclusion15 decks165 decks
Vandalblast
9.1%inclusion50 decks550 decks
Praetor's Grasp
8.5%inclusion10 decks118 decks
Damn
8.5%inclusion10 decks118 decks
Winds of Abandon
7.8%inclusion43 decks550 decks
Wheel of Fortune
7.5%inclusion41 decks550 decks
Eldritch Evolution
7.3%inclusion13 decks179 decks
Sea Gate Restoration
6.7%inclusion11 decks165 decks
Gitaxian Probe
6.7%inclusion11 decks165 decks
Expressive Iteration
6.7%inclusion11 decks165 decks
Shatterskull Smashing
6.4%inclusion35 decks550 decks
Stump Stomp
6.1%inclusion11 decks179 decks
Role Reversal
6.1%inclusion10 decks165 decks
Reanimate
5.9%inclusion7 decks118 decks
Culling Ritual
5.9%inclusion3 decks51 decks
Austere Command
5.8%inclusion32 decks550 decks
Faithless Looting
5.6%inclusion31 decks550 decks
Tempt with Discovery
5.6%inclusion10 decks179 decks
Call Forth the Tempest
5.3%inclusion29 decks550 decks
Nature's Rhythm
5.2%inclusion6 decks116 decks
Diabolic Tutor
5.1%inclusion6 decks118 decks
Contest of Claws
5.0%inclusion9 decks179 decks
Utility Artifacts
Wishclaw Talisman
26%inclusion31 decks118 decks
Vexing Bauble
24%inclusion130 decks549 decks
Lightning Greaves
22%inclusion119 decks550 decks
The One Ring
19%inclusion102 decks550 decks
Swiftfoot Boots
15%inclusion85 decks550 decks
Uba Mask
13%inclusion72 decks550 decks
Omen Machine
13%inclusion69 decks550 decks
Grafdigger's Cage
10%inclusion54 decks550 decks
Inspiring Statuary
10%inclusion54 decks550 decks
Helm of the Host
9.5%inclusion52 decks550 decks
Thorn of Amethyst
8.5%inclusion47 decks550 decks
Chimil, the Inner Sun
7.5%inclusion41 decks550 decks
Sensei's Divining Top
6.5%inclusion36 decks550 decks
Naked Singularity
6.4%inclusion3 decks47 decks
Fist of Suns
6.4%inclusion3 decks47 decks
Cursed Totem
6.4%inclusion35 decks550 decks
Skullclamp
6.4%inclusion35 decks550 decks
Torpor Orb
6.2%inclusion34 decks550 decks
Void Mirror
5.8%inclusion32 decks550 decks
Damping Sphere
5.8%inclusion32 decks550 decks
Trinisphere
5.5%inclusion30 decks550 decks
Birthing Pod
5.0%inclusion9 decks179 decks
Ozolith, the Shattered Spire
5.0%inclusion9 decks179 decks
The Great Henge
5.0%inclusion9 decks179 decks
Enchantments
Smothering Tithe
33%inclusion183 decks550 decks
High Noon
28%inclusion154 decks550 decks
Rule of Law
21%inclusion116 decks550 decks
Sylvan Library
21%inclusion37 decks179 decks
Rest in Peace
17%inclusion95 decks550 decks
Propaganda
17%inclusion28 decks165 decks
Necropotence
17%inclusion20 decks118 decks
Ninja Pizza
16%inclusion5 decks32 decks
Hardened Scales
14%inclusion25 decks179 decks
Mornsong Aria
14%inclusion4 decks29 decks
Leyline of the Void
14%inclusion16 decks118 decks
Blood Moon
13%inclusion72 decks550 decks
Blind Obedience
13%inclusion72 decks550 decks
Leyline of the Guildpact
13%inclusion6 decks47 decks
Windcrag Siege
12%inclusion46 decks372 decks
Eye of the Storm
11%inclusion18 decks165 decks
Land Tax
11%inclusion60 decks550 decks
Ghostly Prison
11%inclusion58 decks550 decks
Doubling Season
10%inclusion18 decks179 decks
Hive Mind
10%inclusion16 decks165 decks
Aura Shards
9.5%inclusion17 decks179 decks
Touch the Spirit Realm
9.1%inclusion50 decks550 decks
Defense of the Heart
8.9%inclusion16 decks179 decks
Sterling Grove
8.9%inclusion16 decks179 decks
Passionate Archaeologist
8.7%inclusion48 decks550 decks
Trouble in Pairs
8.7%inclusion48 decks550 decks
Phyrexian Arena
8.5%inclusion10 decks118 decks
Share the Spoils
8.4%inclusion46 decks550 decks
Breath of Fury
8.0%inclusion44 decks550 decks
Arcane Laboratory
7.9%inclusion13 decks165 decks
Counterbalance
7.9%inclusion13 decks165 decks
Stony Silence
7.8%inclusion43 decks550 decks
Black Market Connections
7.6%inclusion9 decks118 decks
Whirlwind of Thought
7.3%inclusion12 decks165 decks
Wild Growth
7.3%inclusion13 decks179 decks
Painful Quandary
6.8%inclusion8 decks118 decks
Grasp of Fate
6.7%inclusion37 decks550 decks
Carpet of Flowers
6.7%inclusion12 decks179 decks
Zur's Weirding
6.7%inclusion11 decks165 decks
Dovescape
6.7%inclusion11 decks165 decks
Mind's Dilation
6.7%inclusion11 decks165 decks
Sanctum of All
6.4%inclusion3 decks47 decks
Aura of Silence
6.2%inclusion34 decks550 decks
Rhythm of the Wild
6.1%inclusion11 decks179 decks
Shared Fate
6.1%inclusion10 decks165 decks
Charred Foyer // Warped Space
6.1%inclusion30 decks495 decks
Wild Wasteland
6.0%inclusion33 decks550 decks
Planar Void
5.9%inclusion7 decks118 decks
Animate Dead
5.9%inclusion7 decks118 decks
Underworld Breach
5.8%inclusion32 decks550 decks
Battles
Invasion of Ikoria
9.5%inclusion17 decks179 decks
Planeswalkers
Quintorius Kand
13%inclusion71 decks550 decks
Tyvar, Jubilant Brawler
12%inclusion6 decks51 decks
Narset, Parter of Veils
10%inclusion17 decks165 decks
Ashiok, Dream Render
9.1%inclusion5 decks55 decks
Karn, the Great Creator
7.5%inclusion41 decks550 decks
Oko, Thief of Crowns
6.5%inclusion4 decks62 decks
Dihada, Binder of Wills
5.9%inclusion7 decks118 decks
Aminatou, the Fateshifter
5.5%inclusion3 decks55 decks
Utility Lands
Otawara, Soaring City
32%inclusion53 decks165 decks
Boseiju, Who Endures
29%inclusion52 decks179 decks
Mosswort Bridge
19%inclusion34 decks179 decks
Urza's Saga
18%inclusion99 decks550 decks
Eiganjo, Seat of the Empire
17%inclusion92 decks550 decks
Sokenzan, Crucible of Defiance
14%inclusion77 decks550 decks
Reliquary Tower
14%inclusion76 decks550 decks
Gaea's Cradle
12%inclusion22 decks179 decks
Kessig Wolf Run
12%inclusion21 decks179 decks
Rogue's Passage
11%inclusion58 decks550 decks
Shifting Woodland
8.9%inclusion16 decks179 decks
Mistrise Village
8.7%inclusion9 decks103 decks
Bojuka Bog
8.5%inclusion10 decks118 decks
The Shire
8.4%inclusion15 decks179 decks
Blinkmoth Nexus
8.4%inclusion46 decks550 decks
Takenuma, Abandoned Mire
7.6%inclusion9 decks118 decks
Command Beacon
7.3%inclusion40 decks550 decks
Mishra's Factory
6.9%inclusion38 decks550 decks
Windbrisk Heights
6.7%inclusion37 decks550 decks
Trenzalore Clocktower
6.7%inclusion11 decks165 decks
Arena of Glory
6.0%inclusion33 decks546 decks
Vault of the Archangel
5.9%inclusion7 decks118 decks
City of Traitors
5.8%inclusion32 decks550 decks
Spinerock Knoll
5.8%inclusion32 decks550 decks
Yavimaya, Cradle of Growth
5.8%inclusion32 decks550 decks
Minas Tirith
5.6%inclusion31 decks550 decks
Kher Keep
5.5%inclusion30 decks550 decks
Cori Mountain Monastery
5.4%inclusion20 decks373 decks
Inventors' Fair
5.3%inclusion29 decks550 decks
Mana Artifacts
Sol Ring
88%inclusion482 decks550 decks
Arcane Signet
74%inclusion408 decks550 decks
Talisman of Conviction
39%inclusion214 decks550 decks
Talisman of Hierarchy
32%inclusion38 decks118 decks
Fellwar Stone
30%inclusion165 decks550 decks
Talisman of Indulgence
28%inclusion33 decks118 decks
Talisman of Progress
25%inclusion41 decks165 decks
Talisman of Creativity
25%inclusion41 decks165 decks
Lotus Petal
24%inclusion130 decks550 decks
Boros Signet
23%inclusion127 decks550 decks
Mana Vault
22%inclusion120 decks550 decks
Mox Diamond
17%inclusion91 decks550 decks
Azorius Signet
13%inclusion22 decks165 decks
Izzet Signet
13%inclusion21 decks165 decks
Mox Opal
13%inclusion69 decks550 decks
Mind Stone
10%inclusion55 decks550 decks
Thought Vessel
9.5%inclusion52 decks550 decks
Mox Amber
9.1%inclusion50 decks550 decks
Timeless Lotus
8.5%inclusion4 decks47 decks
Chromatic Lantern
7.6%inclusion42 decks550 decks
Springleaf Drum
6.9%inclusion38 decks550 decks
Orzhov Signet
6.8%inclusion8 decks118 decks
Talisman of Unity
6.7%inclusion12 decks179 decks
Talisman of Impulse
6.1%inclusion11 decks179 decks
Rakdos Signet
5.9%inclusion7 decks118 decks
Mana Crypt
5.5%inclusion30 decks550 decks
Grim Monolith
5.5%inclusion30 decks550 decks
Talisman of Dominance
5.5%inclusion3 decks55 decks
Lion's Eye Diamond
5.1%inclusion28 decks550 decks
Lands
Command Tower
89%inclusion490 decks550 decks
Sacred Foundry
56%inclusion308 decks550 decks
Hallowed Fountain
53%inclusion87 decks165 decks
Exotic Orchard
52%inclusion288 decks550 decks
Godless Shrine
52%inclusion61 decks118 decks
Arid Mesa
49%inclusion272 decks550 decks
Temple Garden
48%inclusion86 decks179 decks
Steam Vents
48%inclusion79 decks165 decks
Blood Crypt
46%inclusion54 decks118 decks
Battlefield Forge
44%inclusion243 decks550 decks
Spectator Seating
43%inclusion238 decks550 decks
Stomping Ground
42%inclusion76 decks179 decks
Clifftop Retreat
40%inclusion219 decks550 decks
Underground Sea
38%inclusion21 decks55 decks
Badlands
37%inclusion44 decks118 decks
Scrubland
37%inclusion44 decks118 decks
Training Center
36%inclusion59 decks165 decks
Sea of Clouds
35%inclusion57 decks165 decks
Vault of Champions
33%inclusion39 decks118 decks
Jetmir's Garden
33%inclusion59 decks179 decks
Jungle Shrine
33%inclusion59 decks179 decks
Flooded Strand
33%inclusion180 decks550 decks
Watery Grave
33%inclusion18 decks55 decks
Windswept Heath
31%inclusion173 decks550 decks
Bountiful Promenade
31%inclusion56 decks179 decks
Spara's Headquarters
31%inclusion19 decks62 decks
Breeding Pool
31%inclusion19 decks62 decks
Tundra
30%inclusion50 decks165 decks
Volcanic Island
30%inclusion50 decks165 decks
Raugrin Triome
30%inclusion50 decks165 decks
Luxury Suite
30%inclusion35 decks118 decks
Cinder Glade
30%inclusion53 decks179 decks
Bayou
29%inclusion15 decks51 decks
Plateau
29%inclusion160 decks550 decks
Glacial Fortress
29%inclusion48 decks165 decks
Tropical Island
29%inclusion18 decks62 decks
Wooded Foothills
29%inclusion159 decks550 decks
Scalding Tarn
29%inclusion157 decks550 decks
Marsh Flats
28%inclusion156 decks550 decks
Canopy Vista
28%inclusion50 decks179 decks
Brushland
27%inclusion49 decks179 decks
Sulfur Falls
27%inclusion45 decks165 decks
Bloodstained Mire
27%inclusion146 decks550 decks
Karplusan Forest
26%inclusion47 decks179 decks
City of Brass
26%inclusion143 decks550 decks
Spire Garden
26%inclusion46 decks179 decks
The World Tree
26%inclusion12 decks47 decks
Mana Confluence
25%inclusion136 decks550 decks
Rockfall Vale
24%inclusion43 decks179 decks
Rugged Prairie
24%inclusion132 decks550 decks