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%inclusion98 decks12.6K decks
Rocco, Street Chef
0.6%inclusion74 decks12K decks
The War Doctor // Clara Oswald
2.1%inclusion26 decks1.25K decks
Queen Kayla bin-Kroog
1.1%inclusion24 decks2.11K decks
Pramikon, Sky Rampart
0.3%inclusion17 decks6.66K decks
Zedruu the Greathearted
0.1%inclusion13 decks11.3K decks
Aragorn, the Uniter
0.0%inclusion9 decks21.1K decks
Kenrith, the Returned King
0.0%inclusion9 decks29.7K decks
Pia Nalaar, Consul of Revival
0.3%inclusion8 decks2.92K decks
Kaalia of the Vast
0.0%inclusion8 decks36.6K decks
Rocco, Cabaretti Caterer
0.1%inclusion8 decks8.76K decks
Arabella, Abandoned Doll
0.0%inclusion7 decks19.7K decks
The War Doctor // K-9, Mark I
1.6%inclusion7 decks426 decks
The War Doctor // Adric, Mathematical Genius
4.3%inclusion7 decks162 decks
Dihada, Binder of Wills
0.1%inclusion6 decks10.7K decks
Bruse Tarl, Boorish Herder // Kamahl, Heart of Krosa
1.6%inclusion6 decks368 decks
Jetmir, Nexus of Revels
0.1%inclusion6 decks9.58K decks
Sisay, Weatherlight Captain
0.0%inclusion6 decks17.2K decks
New Cards
Scorched Geyser
7.1%inclusion1 decks14 decks
Yavimaya Bloomsage
6.7%inclusion1 decks15 decks
Studious First-Year
6.7%inclusion1 decks15 decks
Improvisation Capstone
6.0%inclusion3 decks50 decks
Suspend Aggression
4.3%inclusion2 decks46 decks
High Synergy Cards
Lavinia, Azorius Renegade
59%inclusion97 decks164 decks
Archon of Emeria
41%inclusion224 decks543 decks
Eidolon of Rhetoric
35%inclusion189 decks543 decks
Deafening Silence
34%inclusion186 decks543 decks
Night of the Sweets' Revenge
32%inclusion58 decks180 decks
Esper Sentinel
49%inclusion267 decks543 decks
Aven Mindcensor
33%inclusion179 decks543 decks
Knowledge Pool
29%inclusion159 decks543 decks
Grand Abolisher
37%inclusion203 decks543 decks
Jaheira, Friend of the Forest
31%inclusion56 decks180 decks
Top Cards
Swords to Plowshares
64%inclusion346 decks543 decks
Path to Exile
48%inclusion258 decks543 decks
Birds of Paradise
47%inclusion85 decks180 decks
Mystic Remora
42%inclusion69 decks164 decks
Delighted Halfling
36%inclusion65 decks180 decks
Annie Joins Up
34%inclusion62 decks180 decks
Dark Ritual
34%inclusion41 decks120 decks
Cyclonic Rift
34%inclusion55 decks164 decks
Deflecting Swat
34%inclusion182 decks543 decks
Dauthi Voidwalker
33%inclusion40 decks120 decks
Game Changers
Drannith Magistrate
59%inclusion319 decks543 decks
Demonic Tutor
51%inclusion61 decks120 decks
Opposition Agent
49%inclusion59 decks120 decks
Rhystic Study
49%inclusion80 decks164 decks
Vampiric Tutor
47%inclusion56 decks120 decks
Enlightened Tutor
40%inclusion216 decks543 decks
Imperial Seal
31%inclusion37 decks120 decks
Orcish Bowmasters
31%inclusion37 decks120 decks
Ancient Tomb
27%inclusion147 decks543 decks
Chrome Mox
23%inclusion123 decks543 decks
Creatures
Ignoble Hierarch
30%inclusion16 decks53 decks
Lotho, Corrupt Shirriff
28%inclusion33 decks120 decks
Avacyn's Pilgrim
27%inclusion49 decks180 decks
Ethersworn Canonist
27%inclusion146 decks543 decks
Ragavan, Nimble Pilferer
27%inclusion145 decks543 decks
Peregrin Took
27%inclusion48 decks180 decks
Kami of Whispered Hopes
27%inclusion48 decks180 decks
Noble Hierarch
27%inclusion17 decks64 decks
Bloom Tender
26%inclusion47 decks180 decks
Kutzil, Malamet Exemplar
25%inclusion45 decks180 decks
Professional Face-Breaker
25%inclusion135 decks543 decks
Thalia, Guardian of Thraben
24%inclusion132 decks543 decks
Imperial Recruiter
23%inclusion126 decks543 decks
Samwise Gamgee
23%inclusion41 decks180 decks
Archivist of Oghma
23%inclusion123 decks543 decks
Baylen, the Haymaker
23%inclusion38 decks168 decks
Ranger-Captain of Eos
22%inclusion120 decks543 decks
Voice of Victory
22%inclusion78 decks357 decks
Faldorn, Dread Wolf Herald
22%inclusion39 decks180 decks
Gilded Goose
22%inclusion39 decks180 decks
Talion, the Kindly Lord
21%inclusion12 decks56 decks
Incubation Druid
21%inclusion38 decks180 decks
Etali, Primal Conqueror
21%inclusion38 decks180 decks
Soulless Jailer
21%inclusion113 decks543 decks
Deathrite Shaman
21%inclusion11 decks53 decks
Combat Celebrant
20%inclusion111 decks543 decks
Mother of Runes
20%inclusion111 decks543 decks
Magus of the Moon
20%inclusion110 decks543 decks
Spirit of the Labyrinth
20%inclusion109 decks543 decks
Drana and Linvala
20%inclusion24 decks120 decks
Aven Interrupter
20%inclusion107 decks543 decks
Elvish Mystic
18%inclusion33 decks180 decks
Llanowar Elves
18%inclusion32 decks180 decks
Basking Broodscale
17%inclusion31 decks178 decks
Collector Ouphe
17%inclusion31 decks180 decks
Thalia, Heretic Cathar
17%inclusion92 decks543 decks
Blade Historian
17%inclusion91 decks543 decks
Simian Spirit Guide
17%inclusion91 decks543 decks
Dauntless Dismantler
16%inclusion89 decks543 decks
Faeburrow Elder
16%inclusion29 decks180 decks
Ornithopter of Paradise
16%inclusion87 decks543 decks
Witch Enchanter
16%inclusion85 decks536 decks
Loyal Apprentice
15%inclusion84 decks543 decks
Evolution Witness
15%inclusion27 decks177 decks
Legion Warboss
15%inclusion82 decks543 decks
Giver of Runes
15%inclusion82 decks543 decks
Recruiter of the Guard
15%inclusion81 decks543 decks
Grand Arbiter Augustin IV
15%inclusion24 decks164 decks
Urabrask, Heretic Praetor
15%inclusion79 decks543 decks
Selfless Spirit
14%inclusion77 decks543 decks
Instants
Fierce Guardianship
32%inclusion52 decks164 decks
Silence
26%inclusion139 decks543 decks
An Offer You Can't Refuse
24%inclusion40 decks164 decks
Worldly Tutor
24%inclusion43 decks180 decks
Deadly Rollick
22%inclusion26 decks120 decks
Force of Will
21%inclusion35 decks164 decks
Swan Song
21%inclusion35 decks164 decks
Tainted Pact
21%inclusion25 decks120 decks
Dovin's Veto
21%inclusion34 decks164 decks
Force of Negation
20%inclusion32 decks164 decks
Counterspell
20%inclusion32 decks164 decks
Heroic Intervention
19%inclusion35 decks180 decks
Beast Within
19%inclusion35 decks180 decks
Mystical Tutor
18%inclusion30 decks164 decks
Mana Drain
18%inclusion30 decks164 decks
Teferi's Protection
18%inclusion99 decks543 decks
Eladamri's Call
18%inclusion32 decks180 decks
Chaos Warp
18%inclusion96 decks543 decks
Anguished Unmaking
18%inclusion21 decks120 decks
Red Elemental Blast
17%inclusion95 decks543 decks
Pyroblast
17%inclusion90 decks543 decks
Inspiring Call
16%inclusion29 decks180 decks
Generous Gift
16%inclusion86 decks543 decks
Arcane Denial
15%inclusion25 decks164 decks
Boros Charm
15%inclusion82 decks543 decks
Abrupt Decay
15%inclusion8 decks53 decks
Tibalt's Trickery
15%inclusion80 decks543 decks
Flawless Maneuver
15%inclusion79 decks543 decks
Mindbreak Trap
14%inclusion23 decks164 decks
Mental Misstep
14%inclusion23 decks164 decks
Flusterstorm
14%inclusion23 decks164 decks
Guff Rewrites History
12%inclusion67 decks543 decks
Flare of Fortitude
12%inclusion63 decks536 decks
Assassin's Trophy
11%inclusion6 decks53 decks
Brainstorm
11%inclusion18 decks164 decks
Pact of Negation
10%inclusion17 decks164 decks
Sink into Stupor
10%inclusion16 decks161 decks
Negate
10%inclusion16 decks164 decks
Crop Rotation
9.4%inclusion17 decks180 decks
Abrade
9.0%inclusion49 decks543 decks
Rampage of the Clans
8.9%inclusion16 decks180 decks
Chord of Calling
8.9%inclusion16 decks180 decks
Delayed Blast Fireball
8.8%inclusion48 decks543 decks
Brain Freeze
8.5%inclusion14 decks164 decks
Zoyowa's Justice
8.5%inclusion46 decks543 decks
Wear // Tear
7.9%inclusion43 decks543 decks
Growth Spiral
7.8%inclusion5 decks64 decks
Reprieve
7.7%inclusion42 decks543 decks
Imp's Mischief
7.5%inclusion9 decks120 decks
Angel's Grace
7.4%inclusion40 decks543 decks
Sorceries
Nature's Lore
31%inclusion56 decks180 decks
Farseek
31%inclusion55 decks180 decks
Three Visits
27%inclusion49 decks180 decks
Jeska's Will
22%inclusion121 decks543 decks
Rampant Growth
21%inclusion37 decks180 decks
Gamble
19%inclusion101 decks543 decks
Diabolic Intent
18%inclusion22 decks120 decks
Toxic Deluge
18%inclusion22 decks120 decks
Blasphemous Act
17%inclusion94 decks543 decks
Cultivate
17%inclusion30 decks180 decks
Windfall
16%inclusion26 decks164 decks
Ruinous Ultimatum
15%inclusion18 decks120 decks
Farewell
15%inclusion79 decks543 decks
Beseech the Mirror
14%inclusion17 decks120 decks
Supreme Verdict
14%inclusion23 decks164 decks
Grim Tutor
13%inclusion16 decks120 decks
Sevinne's Reclamation
13%inclusion71 decks543 decks
Escape to the Wilds
13%inclusion23 decks180 decks
Idyllic Tutor
10%inclusion56 decks543 decks
Avatar's Wrath
10%inclusion18 decks186 decks
Finale of Devastation
9.4%inclusion17 decks180 decks
Kodama's Reach
9.4%inclusion17 decks180 decks
Vandalblast
9.4%inclusion51 decks543 decks
Fractured Identity
8.5%inclusion14 decks164 decks
Praetor's Grasp
8.3%inclusion10 decks120 decks
Damn
8.3%inclusion10 decks120 decks
Wheel of Fortune
7.6%inclusion41 decks543 decks
Winds of Abandon
7.4%inclusion40 decks543 decks
Eldritch Evolution
7.2%inclusion13 decks180 decks
Sea Gate Restoration
6.7%inclusion11 decks164 decks
Gitaxian Probe
6.7%inclusion11 decks164 decks
Expressive Iteration
6.7%inclusion11 decks164 decks
Shatterskull Smashing
6.3%inclusion34 decks543 decks
Austere Command
6.3%inclusion34 decks543 decks
Stump Stomp
6.2%inclusion11 decks177 decks
Role Reversal
6.1%inclusion10 decks164 decks
Reanimate
5.8%inclusion7 decks120 decks
Culling Ritual
5.7%inclusion3 decks53 decks
Tempt with Discovery
5.6%inclusion10 decks180 decks
Tasha's Hideous Laughter
5.5%inclusion9 decks164 decks
Faithless Looting
5.3%inclusion29 decks543 decks
Nature's Rhythm
5.3%inclusion6 decks114 decks
Call Forth the Tempest
5.2%inclusion28 decks543 decks
Utility Artifacts
Wishclaw Talisman
25%inclusion30 decks120 decks
Vexing Bauble
24%inclusion127 decks534 decks
Lightning Greaves
22%inclusion118 decks543 decks
The One Ring
19%inclusion104 decks543 decks
Swiftfoot Boots
15%inclusion83 decks543 decks
Uba Mask
13%inclusion71 decks543 decks
Omen Machine
13%inclusion69 decks543 decks
Grafdigger's Cage
10%inclusion55 decks543 decks
Inspiring Statuary
10%inclusion55 decks543 decks
Helm of the Host
8.8%inclusion48 decks543 decks
Thorn of Amethyst
8.7%inclusion47 decks543 decks
Chimil, the Inner Sun
7.6%inclusion41 decks543 decks
Cursed Totem
6.4%inclusion35 decks543 decks
Sensei's Divining Top
6.4%inclusion35 decks543 decks
Torpor Orb
6.3%inclusion34 decks543 decks
Skullclamp
6.3%inclusion34 decks543 decks
Naked Singularity
6.1%inclusion3 decks49 decks
Fist of Suns
6.1%inclusion3 decks49 decks
Damping Sphere
6.1%inclusion33 decks543 decks
Void Mirror
5.9%inclusion32 decks543 decks
The Great Henge
5.6%inclusion10 decks180 decks
Trinisphere
5.5%inclusion30 decks543 decks
Wand of Wonder
5.2%inclusion28 decks543 decks
Enchantments
Smothering Tithe
33%inclusion180 decks543 decks
High Noon
28%inclusion153 decks543 decks
Rule of Law
21%inclusion116 decks543 decks
Sylvan Library
21%inclusion38 decks180 decks
Rest in Peace
18%inclusion98 decks543 decks
Propaganda
18%inclusion29 decks164 decks
Necropotence
17%inclusion20 decks120 decks
Mornsong Aria
14%inclusion4 decks28 decks
Ninja Pizza
14%inclusion4 decks28 decks
Leyline of the Void
14%inclusion17 decks120 decks
Hardened Scales
14%inclusion25 decks180 decks
Blood Moon
13%inclusion71 decks543 decks
Blind Obedience
13%inclusion71 decks543 decks
Leyline of the Guildpact
12%inclusion6 decks49 decks
Windcrag Siege
12%inclusion43 decks356 decks
Land Tax
11%inclusion61 decks543 decks
Eye of the Storm
11%inclusion18 decks164 decks
Ghostly Prison
11%inclusion58 decks543 decks
Sterling Grove
9.4%inclusion17 decks180 decks
Aura Shards
9.4%inclusion17 decks180 decks
Hive Mind
9.1%inclusion15 decks164 decks
Touch the Spirit Realm
9.0%inclusion49 decks543 decks
Doubling Season
8.9%inclusion16 decks180 decks
Passionate Archaeologist
8.8%inclusion48 decks543 decks
Trouble in Pairs
8.8%inclusion48 decks543 decks
Share the Spoils
8.7%inclusion47 decks543 decks
Phyrexian Arena
8.3%inclusion10 decks120 decks
Stony Silence
8.3%inclusion45 decks543 decks
Sanctum of All
8.2%inclusion4 decks49 decks
Arcane Laboratory
7.9%inclusion13 decks164 decks
Counterbalance
7.9%inclusion13 decks164 decks
Breath of Fury
7.9%inclusion43 decks543 decks
Defense of the Heart
7.8%inclusion14 decks180 decks
Black Market Connections
7.5%inclusion9 decks120 decks
Zur's Weirding
6.7%inclusion11 decks164 decks
Whirlwind of Thought
6.7%inclusion11 decks164 decks
Painful Quandary
6.7%inclusion8 decks120 decks
Carpet of Flowers
6.7%inclusion12 decks180 decks
Wild Growth
6.7%inclusion12 decks180 decks
Rhythm of the Wild
6.7%inclusion12 decks180 decks
Grasp of Fate
6.3%inclusion34 decks543 decks
Charred Foyer // Warped Space
6.3%inclusion30 decks480 decks
Maelstrom Nexus
6.1%inclusion3 decks49 decks
Shared Fate
6.1%inclusion10 decks164 decks
Dovescape
6.1%inclusion10 decks164 decks
Mind's Dilation
6.1%inclusion10 decks164 decks
Leyline of Anticipation
6.1%inclusion10 decks164 decks
Wild Wasteland
5.9%inclusion32 decks543 decks
Planar Void
5.8%inclusion7 decks120 decks
Animate Dead
5.8%inclusion7 decks120 decks
Battles
Invasion of Ikoria
9.4%inclusion17 decks180 decks
Planeswalkers
Teferi, Time Raveler
33%inclusion54 decks164 decks
Quintorius Kand
13%inclusion71 decks543 decks
Tyvar, Jubilant Brawler
11%inclusion6 decks53 decks
Narset, Parter of Veils
11%inclusion18 decks164 decks
Ashiok, Dream Render
8.9%inclusion5 decks56 decks
Karn, the Great Creator
7.6%inclusion41 decks543 decks
Oko, Thief of Crowns
6.3%inclusion4 decks64 decks
Dihada, Binder of Wills
5.8%inclusion7 decks120 decks
Aminatou, the Fateshifter
5.4%inclusion3 decks56 decks
Utility Lands
Otawara, Soaring City
33%inclusion54 decks164 decks
Boseiju, Who Endures
29%inclusion52 decks180 decks
Mosswort Bridge
19%inclusion35 decks180 decks
Urza's Saga
18%inclusion96 decks543 decks
Eiganjo, Seat of the Empire
17%inclusion90 decks543 decks
Sokenzan, Crucible of Defiance
14%inclusion77 decks543 decks
Reliquary Tower
14%inclusion74 decks543 decks
Gaea's Cradle
13%inclusion23 decks180 decks
Kessig Wolf Run
12%inclusion21 decks180 decks
Rogue's Passage
10%inclusion57 decks543 decks
Mistrise Village
9.3%inclusion9 decks97 decks
Bojuka Bog
9.2%inclusion11 decks120 decks
Shifting Woodland
9.0%inclusion16 decks177 decks
The Shire
8.9%inclusion16 decks180 decks
Blinkmoth Nexus
8.5%inclusion46 decks543 decks
Takenuma, Abandoned Mire
7.5%inclusion9 decks120 decks
Command Beacon
7.4%inclusion40 decks543 decks
Windbrisk Heights
7.2%inclusion39 decks543 decks
Mishra's Factory
7.0%inclusion38 decks543 decks
Trenzalore Clocktower
6.7%inclusion11 decks164 decks
Vault of the Archangel
6.7%inclusion8 decks120 decks
Arena of Glory
6.2%inclusion33 decks531 decks
Spinerock Knoll
6.1%inclusion33 decks543 decks
Yavimaya, Cradle of Growth
5.9%inclusion32 decks543 decks
City of Traitors
5.7%inclusion31 decks543 decks
Minas Tirith
5.7%inclusion31 decks543 decks
Cori Mountain Monastery
5.6%inclusion20 decks357 decks
Kher Keep
5.5%inclusion30 decks543 decks
Mana Artifacts
Sol Ring
87%inclusion475 decks543 decks
Arcane Signet
74%inclusion404 decks543 decks
Talisman of Conviction
39%inclusion211 decks543 decks
Talisman of Hierarchy
32%inclusion38 decks120 decks
Fellwar Stone
30%inclusion164 decks543 decks
Talisman of Indulgence
28%inclusion33 decks120 decks
Talisman of Progress
24%inclusion39 decks164 decks
Talisman of Creativity
24%inclusion39 decks164 decks
Lotus Petal
23%inclusion127 decks543 decks
Boros Signet
23%inclusion126 decks543 decks
Mana Vault
22%inclusion119 decks543 decks
Mox Diamond
17%inclusion90 decks543 decks
Azorius Signet
13%inclusion22 decks164 decks
Izzet Signet
13%inclusion21 decks164 decks
Mox Opal
12%inclusion67 decks543 decks
Timeless Lotus
10%inclusion5 decks49 decks
Mind Stone
10%inclusion54 decks543 decks
Thought Vessel
10%inclusion52 decks543 decks
Mox Amber
9.2%inclusion50 decks543 decks
Chromatic Lantern
7.9%inclusion43 decks543 decks
Orzhov Signet
7.5%inclusion9 decks120 decks
Springleaf Drum
6.8%inclusion37 decks543 decks
Talisman of Unity
6.7%inclusion12 decks180 decks
Talisman of Impulse
6.1%inclusion11 decks180 decks
Mana Crypt
5.9%inclusion32 decks543 decks
Rakdos Signet
5.8%inclusion7 decks120 decks
Talisman of Dominance
5.4%inclusion3 decks56 decks
Grim Monolith
5.3%inclusion29 decks543 decks
Lands
Command Tower
89%inclusion484 decks543 decks
Sacred Foundry
56%inclusion304 decks543 decks
Hallowed Fountain
53%inclusion87 decks164 decks
Exotic Orchard
53%inclusion287 decks543 decks
Godless Shrine
53%inclusion63 decks120 decks
Arid Mesa
50%inclusion270 decks543 decks
Steam Vents
49%inclusion80 decks164 decks
Temple Garden
48%inclusion86 decks180 decks
Blood Crypt
46%inclusion55 decks120 decks
Battlefield Forge
44%inclusion237 decks543 decks
Spectator Seating
43%inclusion236 decks543 decks
Stomping Ground
43%inclusion77 decks180 decks
Clifftop Retreat
39%inclusion213 decks543 decks
Training Center
37%inclusion60 decks164 decks
Badlands
36%inclusion43 decks120 decks
Scrubland
36%inclusion43 decks120 decks
Underground Sea
36%inclusion20 decks56 decks
Sea of Clouds
35%inclusion57 decks164 decks
Vault of Champions
33%inclusion40 decks120 decks
Jetmir's Garden
33%inclusion60 decks180 decks
Jungle Shrine
33%inclusion60 decks180 decks
Breeding Pool
33%inclusion21 decks64 decks
Flooded Strand
33%inclusion178 decks543 decks
Watery Grave
32%inclusion18 decks56 decks
Windswept Heath
32%inclusion172 decks543 decks
Spara's Headquarters
31%inclusion20 decks64 decks
Bountiful Promenade
31%inclusion55 decks180 decks
Cinder Glade
31%inclusion55 decks180 decks
Tundra
30%inclusion50 decks164 decks
Volcanic Island
30%inclusion50 decks164 decks
Raugrin Triome
30%inclusion50 decks164 decks
Luxury Suite
29%inclusion35 decks120 decks
Wooded Foothills
29%inclusion158 decks543 decks
Plateau
29%inclusion158 decks543 decks
Canopy Vista
29%inclusion52 decks180 decks
Marsh Flats
29%inclusion155 decks543 decks
Scalding Tarn
29%inclusion155 decks543 decks
Bayou
28%inclusion15 decks53 decks
Tropical Island
28%inclusion18 decks64 decks
Glacial Fortress
28%inclusion46 decks164 decks
Brushland
27%inclusion49 decks180 decks
The World Tree
27%inclusion13 decks49 decks
Bloodstained Mire
27%inclusion144 decks543 decks
Sulfur Falls
26%inclusion43 decks164 decks
Karplusan Forest
26%inclusion47 decks180 decks
City of Brass
26%inclusion140 decks543 decks
Mana Confluence
25%inclusion134 decks543 decks
Spire Garden
24%inclusion44 decks180 decks
Gemstone Caverns
24%inclusion129 decks543 decks
Rockfall Vale
23%inclusion42 decks180 decks