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%inclusion97 decks12.6K decks
Rocco, Street Chef
0.6%inclusion74 decks12K decks
The War Doctor // Clara Oswald
2.2%inclusion27 decks1.25K decks
Queen Kayla bin-Kroog
1.1%inclusion24 decks2.10K decks
Pramikon, Sky Rampart
0.2%inclusion16 decks6.64K decks
Zedruu the Greathearted
0.1%inclusion13 decks11.3K decks
Kenrith, the Returned King
0.0%inclusion9 decks29.5K decks
Kaalia of the Vast
0.0%inclusion8 decks36.4K decks
Rocco, Cabaretti Caterer
0.1%inclusion8 decks8.72K decks
Aragorn, the Uniter
0.0%inclusion8 decks21.1K decks
Arabella, Abandoned Doll
0.0%inclusion7 decks19.6K decks
Pia Nalaar, Consul of Revival
0.2%inclusion7 decks2.90K decks
The War Doctor // K-9, Mark I
1.7%inclusion7 decks424 decks
The War Doctor // Adric, Mathematical Genius
4.3%inclusion7 decks162 decks
Dihada, Binder of Wills
0.1%inclusion6 decks10.6K decks
Bruse Tarl, Boorish Herder // Kamahl, Heart of Krosa
1.7%inclusion6 decks362 decks
Jetmir, Nexus of Revels
0.1%inclusion6 decks9.55K decks
Sisay, Weatherlight Captain
0.0%inclusion6 decks17.1K decks
New Cards
Ninja Pizza
15%inclusion4 decks26 decks
Scorched Geyser
9.1%inclusion1 decks11 decks
Mikey & Leo, Chaos & Order
8.3%inclusion3 decks36 decks
Yavimaya Bloomsage
7.7%inclusion1 decks13 decks
Improvisation Capstone
7.3%inclusion3 decks41 decks
High Synergy Cards
Lavinia, Azorius Renegade
58%inclusion95 decks163 decks
Archon of Emeria
41%inclusion222 decks539 decks
Eidolon of Rhetoric
35%inclusion190 decks539 decks
Deafening Silence
34%inclusion184 decks539 decks
Night of the Sweets' Revenge
32%inclusion58 decks179 decks
Esper Sentinel
49%inclusion266 decks539 decks
Aven Mindcensor
33%inclusion177 decks539 decks
Knowledge Pool
29%inclusion157 decks539 decks
Jaheira, Friend of the Forest
32%inclusion57 decks179 decks
Grand Abolisher
37%inclusion201 decks539 decks
Top Cards
Swords to Plowshares
64%inclusion344 decks539 decks
Birds of Paradise
47%inclusion85 decks179 decks
Path to Exile
47%inclusion254 decks539 decks
Mystic Remora
43%inclusion70 decks163 decks
Delighted Halfling
36%inclusion64 decks179 decks
Annie Joins Up
35%inclusion62 decks179 decks
Cyclonic Rift
34%inclusion56 decks163 decks
Dark Ritual
34%inclusion41 decks120 decks
Deflecting Swat
34%inclusion182 decks539 decks
Teferi, Time Raveler
34%inclusion55 decks163 decks
Game Changers
Drannith Magistrate
59%inclusion316 decks539 decks
Demonic Tutor
51%inclusion61 decks120 decks
Opposition Agent
50%inclusion60 decks120 decks
Rhystic Study
50%inclusion81 decks163 decks
Vampiric Tutor
47%inclusion56 decks120 decks
Enlightened Tutor
40%inclusion215 decks539 decks
Imperial Seal
31%inclusion37 decks120 decks
Orcish Bowmasters
31%inclusion37 decks120 decks
Ancient Tomb
27%inclusion145 decks539 decks
Chrome Mox
23%inclusion123 decks539 decks
Creatures
Dauthi Voidwalker
33%inclusion40 decks120 decks
Ignoble Hierarch
30%inclusion16 decks53 decks
Lotho, Corrupt Shirriff
28%inclusion33 decks120 decks
Kami of Whispered Hopes
27%inclusion49 decks179 decks
Ethersworn Canonist
27%inclusion146 decks539 decks
Noble Hierarch
27%inclusion17 decks63 decks
Ragavan, Nimble Pilferer
27%inclusion145 decks539 decks
Peregrin Took
27%inclusion48 decks179 decks
Bloom Tender
27%inclusion48 decks179 decks
Avacyn's Pilgrim
27%inclusion48 decks179 decks
Thalia, Guardian of Thraben
25%inclusion133 decks539 decks
Professional Face-Breaker
25%inclusion133 decks539 decks
Kutzil, Malamet Exemplar
25%inclusion44 decks179 decks
Samwise Gamgee
23%inclusion42 decks179 decks
Imperial Recruiter
23%inclusion125 decks539 decks
Archivist of Oghma
23%inclusion122 decks539 decks
Voice of Victory
22%inclusion78 decks349 decks
Faldorn, Dread Wolf Herald
22%inclusion40 decks179 decks
Baylen, the Haymaker
22%inclusion37 decks166 decks
Ranger-Captain of Eos
22%inclusion120 decks539 decks
Gilded Goose
22%inclusion39 decks179 decks
Talion, the Kindly Lord
21%inclusion12 decks56 decks
Incubation Druid
21%inclusion38 decks179 decks
Etali, Primal Conqueror
21%inclusion38 decks179 decks
Soulless Jailer
21%inclusion112 decks539 decks
Mother of Runes
21%inclusion112 decks539 decks
Deathrite Shaman
21%inclusion11 decks53 decks
Magus of the Moon
20%inclusion109 decks539 decks
Spirit of the Labyrinth
20%inclusion108 decks539 decks
Aven Interrupter
20%inclusion108 decks539 decks
Drana and Linvala
20%inclusion24 decks120 decks
Combat Celebrant
20%inclusion107 decks539 decks
Elvish Mystic
18%inclusion33 decks179 decks
Llanowar Elves
18%inclusion32 decks179 decks
Thalia, Heretic Cathar
18%inclusion95 decks539 decks
Basking Broodscale
18%inclusion31 decks176 decks
Collector Ouphe
17%inclusion31 decks179 decks
Simian Spirit Guide
17%inclusion92 decks539 decks
Dauntless Dismantler
17%inclusion89 decks539 decks
Blade Historian
16%inclusion88 decks539 decks
Faeburrow Elder
16%inclusion29 decks179 decks
Ornithopter of Paradise
16%inclusion84 decks539 decks
Witch Enchanter
15%inclusion81 decks528 decks
Giver of Runes
15%inclusion82 decks539 decks
Loyal Apprentice
15%inclusion82 decks539 decks
Legion Warboss
15%inclusion81 decks539 decks
Recruiter of the Guard
15%inclusion81 decks539 decks
Evolution Witness
15%inclusion26 decks175 decks
Urabrask, Heretic Praetor
15%inclusion80 decks539 decks
Grand Arbiter Augustin IV
15%inclusion24 decks163 decks
Instants
Fierce Guardianship
33%inclusion54 decks163 decks
Silence
26%inclusion140 decks539 decks
An Offer You Can't Refuse
25%inclusion40 decks163 decks
Worldly Tutor
24%inclusion43 decks179 decks
Force of Will
23%inclusion37 decks163 decks
Deadly Rollick
22%inclusion26 decks120 decks
Swan Song
21%inclusion34 decks163 decks
Tainted Pact
21%inclusion25 decks120 decks
Heroic Intervention
20%inclusion36 decks179 decks
Force of Negation
20%inclusion32 decks163 decks
Dovin's Veto
20%inclusion32 decks163 decks
Counterspell
20%inclusion32 decks163 decks
Mystical Tutor
19%inclusion31 decks163 decks
Beast Within
19%inclusion34 decks179 decks
Teferi's Protection
18%inclusion98 decks539 decks
Eladamri's Call
18%inclusion32 decks179 decks
Chaos Warp
18%inclusion96 decks539 decks
Mana Drain
18%inclusion29 decks163 decks
Anguished Unmaking
18%inclusion21 decks120 decks
Red Elemental Blast
17%inclusion94 decks539 decks
Inspiring Call
17%inclusion30 decks179 decks
Pyroblast
17%inclusion89 decks539 decks
Generous Gift
16%inclusion84 decks539 decks
Arcane Denial
15%inclusion25 decks163 decks
Tibalt's Trickery
15%inclusion82 decks539 decks
Abrupt Decay
15%inclusion8 decks53 decks
Boros Charm
15%inclusion80 decks539 decks
Mindbreak Trap
15%inclusion24 decks163 decks
Mental Misstep
15%inclusion24 decks163 decks
Flawless Maneuver
14%inclusion77 decks539 decks
Flusterstorm
14%inclusion23 decks163 decks
Guff Rewrites History
12%inclusion67 decks539 decks
Flare of Fortitude
12%inclusion63 decks528 decks
Assassin's Trophy
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Pact of Negation
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Brainstorm
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Sink into Stupor
10%inclusion16 decks158 decks
Negate
10%inclusion16 decks163 decks
Rampage of the Clans
9.5%inclusion17 decks179 decks
Abrade
9.1%inclusion49 decks539 decks
Chord of Calling
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Crop Rotation
8.9%inclusion16 decks179 decks
Delayed Blast Fireball
8.9%inclusion48 decks539 decks
Brain Freeze
8.6%inclusion14 decks163 decks
Zoyowa's Justice
8.3%inclusion45 decks539 decks
Reprieve
7.8%inclusion42 decks539 decks
Wear // Tear
7.6%inclusion41 decks539 decks
Fire Covenant
7.5%inclusion9 decks120 decks
Imp's Mischief
7.5%inclusion9 decks120 decks
Angel's Grace
7.4%inclusion40 decks539 decks
Sorceries
Nature's Lore
31%inclusion56 decks179 decks
Farseek
30%inclusion54 decks179 decks
Three Visits
27%inclusion49 decks179 decks
Jeska's Will
23%inclusion124 decks539 decks
Rampant Growth
20%inclusion36 decks179 decks
Gamble
19%inclusion102 decks539 decks
Diabolic Intent
18%inclusion22 decks120 decks
Toxic Deluge
18%inclusion22 decks120 decks
Blasphemous Act
17%inclusion93 decks539 decks
Cultivate
17%inclusion30 decks179 decks
Windfall
17%inclusion27 decks163 decks
Ruinous Ultimatum
15%inclusion18 decks120 decks
Farewell
14%inclusion78 decks539 decks
Beseech the Mirror
14%inclusion17 decks120 decks
Escape to the Wilds
14%inclusion25 decks179 decks
Grim Tutor
13%inclusion16 decks120 decks
Sevinne's Reclamation
13%inclusion71 decks539 decks
Supreme Verdict
13%inclusion21 decks163 decks
Idyllic Tutor
10%inclusion55 decks539 decks
Avatar's Wrath
10%inclusion17 decks178 decks
Finale of Devastation
9.5%inclusion17 decks179 decks
Vandalblast
9.5%inclusion51 decks539 decks
Damn
9.2%inclusion11 decks120 decks
Kodama's Reach
8.9%inclusion16 decks179 decks
Praetor's Grasp
8.3%inclusion10 decks120 decks
Fractured Identity
8.0%inclusion13 decks163 decks
Wheel of Fortune
7.6%inclusion41 decks539 decks
Winds of Abandon
7.4%inclusion40 decks539 decks
Expressive Iteration
7.4%inclusion12 decks163 decks
Eldritch Evolution
7.3%inclusion13 decks179 decks
Sea Gate Restoration
6.7%inclusion11 decks163 decks
Gitaxian Probe
6.7%inclusion11 decks163 decks
Austere Command
6.5%inclusion35 decks539 decks
Shatterskull Smashing
6.3%inclusion34 decks539 decks
Role Reversal
6.1%inclusion10 decks163 decks
Reanimate
5.8%inclusion7 decks120 decks
Culling Ritual
5.7%inclusion3 decks53 decks
Contest of Claws
5.6%inclusion10 decks179 decks
Tempt with Discovery
5.6%inclusion10 decks179 decks
Tasha's Hideous Laughter
5.5%inclusion9 decks163 decks
Nature's Rhythm
5.4%inclusion6 decks112 decks
Faithless Looting
5.2%inclusion28 decks539 decks
Stump Stomp
5.1%inclusion9 decks175 decks
Call Forth the Tempest
5.0%inclusion27 decks539 decks
Utility Artifacts
Wishclaw Talisman
25%inclusion30 decks120 decks
Vexing Bauble
24%inclusion128 decks526 decks
Lightning Greaves
21%inclusion115 decks539 decks
The One Ring
19%inclusion104 decks539 decks
Swiftfoot Boots
15%inclusion83 decks539 decks
Uba Mask
13%inclusion70 decks539 decks
Omen Machine
13%inclusion69 decks539 decks
Grafdigger's Cage
10%inclusion55 decks539 decks
Inspiring Statuary
10%inclusion55 decks539 decks
Thorn of Amethyst
8.9%inclusion48 decks539 decks
Helm of the Host
8.7%inclusion47 decks539 decks
Chimil, the Inner Sun
7.6%inclusion41 decks539 decks
Cursed Totem
6.3%inclusion34 decks539 decks
Sensei's Divining Top
6.3%inclusion34 decks539 decks
Void Mirror
6.1%inclusion33 decks539 decks
Naked Singularity
6.1%inclusion3 decks49 decks
Damping Sphere
6.1%inclusion33 decks539 decks
Torpor Orb
6.1%inclusion33 decks539 decks
Fist of Suns
6.1%inclusion3 decks49 decks
Skullclamp
6.1%inclusion33 decks539 decks
The Great Henge
5.6%inclusion10 decks179 decks
Trinisphere
5.6%inclusion30 decks539 decks
Wand of Wonder
5.2%inclusion28 decks539 decks
Ozolith, the Shattered Spire
5.0%inclusion9 decks179 decks
Enchantments
Smothering Tithe
33%inclusion178 decks539 decks
High Noon
28%inclusion152 decks539 decks
Rule of Law
22%inclusion118 decks539 decks
Sylvan Library
21%inclusion38 decks179 decks
Rest in Peace
18%inclusion97 decks539 decks
Necropotence
17%inclusion20 decks120 decks
Propaganda
17%inclusion27 decks163 decks
Mornsong Aria
15%inclusion4 decks27 decks
Hardened Scales
15%inclusion26 decks179 decks
Leyline of the Void
14%inclusion17 decks120 decks
Blind Obedience
13%inclusion72 decks539 decks
Blood Moon
13%inclusion70 decks539 decks
Windcrag Siege
13%inclusion44 decks348 decks
Leyline of the Guildpact
12%inclusion6 decks49 decks
Land Tax
11%inclusion60 decks539 decks
Eye of the Storm
10%inclusion17 decks163 decks
Ghostly Prison
10%inclusion56 decks539 decks
Sterling Grove
9.5%inclusion17 decks179 decks
Aura Shards
9.5%inclusion17 decks179 decks
Hive Mind
9.2%inclusion15 decks163 decks
Touch the Spirit Realm
9.1%inclusion49 decks539 decks
Passionate Archaeologist
8.9%inclusion48 decks539 decks
Share the Spoils
8.7%inclusion47 decks539 decks
Trouble in Pairs
8.7%inclusion47 decks539 decks
Arcane Laboratory
8.6%inclusion14 decks163 decks
Stony Silence
8.5%inclusion46 decks539 decks
Doubling Season
8.4%inclusion15 decks179 decks
Sanctum of All
8.2%inclusion4 decks49 decks
Defense of the Heart
7.8%inclusion14 decks179 decks
Breath of Fury
7.8%inclusion42 decks539 decks
Phyrexian Arena
7.5%inclusion9 decks120 decks
Counterbalance
7.4%inclusion12 decks163 decks
Zur's Weirding
6.7%inclusion11 decks163 decks
Whirlwind of Thought
6.7%inclusion11 decks163 decks
Carpet of Flowers
6.7%inclusion12 decks179 decks
Wild Growth
6.7%inclusion12 decks179 decks
Rhythm of the Wild
6.7%inclusion12 decks179 decks
Painful Quandary
6.7%inclusion8 decks120 decks
Black Market Connections
6.7%inclusion8 decks120 decks
Charred Foyer // Warped Space
6.4%inclusion30 decks472 decks
Grasp of Fate
6.3%inclusion34 decks539 decks
Shared Fate
6.1%inclusion10 decks163 decks
Dovescape
6.1%inclusion10 decks163 decks
Mind's Dilation
6.1%inclusion10 decks163 decks
Leyline of Anticipation
6.1%inclusion10 decks163 decks
Maelstrom Nexus
6.1%inclusion3 decks49 decks
Campsite Cuisine
6.0%inclusion4 decks67 decks
Wild Wasteland
5.9%inclusion32 decks539 decks
Aura of Silence
5.9%inclusion32 decks539 decks
Planar Void
5.8%inclusion7 decks120 decks
Battles
Invasion of Ikoria
9.5%inclusion17 decks179 decks
Planeswalkers
Quintorius Kand
13%inclusion71 decks539 decks
Narset, Parter of Veils
12%inclusion19 decks163 decks
Tyvar, Jubilant Brawler
11%inclusion6 decks53 decks
Ashiok, Dream Render
8.9%inclusion5 decks56 decks
Karn, the Great Creator
7.4%inclusion40 decks539 decks
Oko, Thief of Crowns
6.3%inclusion4 decks63 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 decks163 decks
Boseiju, Who Endures
29%inclusion52 decks179 decks
Mosswort Bridge
20%inclusion36 decks179 decks
Urza's Saga
18%inclusion95 decks539 decks
Eiganjo, Seat of the Empire
16%inclusion88 decks539 decks
Sokenzan, Crucible of Defiance
14%inclusion76 decks539 decks
Reliquary Tower
14%inclusion73 decks539 decks
Gaea's Cradle
13%inclusion23 decks179 decks
Kessig Wolf Run
13%inclusion23 decks179 decks
Rogue's Passage
11%inclusion57 decks539 decks
Mistrise Village
10%inclusion9 decks94 decks
Bojuka Bog
9.2%inclusion11 decks120 decks
Shifting Woodland
9.1%inclusion16 decks175 decks
The Shire
8.9%inclusion16 decks179 decks
Blinkmoth Nexus
8.5%inclusion46 decks539 decks
Takenuma, Abandoned Mire
7.5%inclusion9 decks120 decks
Command Beacon
7.4%inclusion40 decks539 decks
Mishra's Factory
6.9%inclusion37 decks539 decks
Trenzalore Clocktower
6.7%inclusion11 decks163 decks
Windbrisk Heights
6.5%inclusion35 decks539 decks
Arena of Glory
6.3%inclusion33 decks523 decks
Spinerock Knoll
5.9%inclusion32 decks539 decks
Yavimaya, Cradle of Growth
5.9%inclusion32 decks539 decks
Vault of the Archangel
5.8%inclusion7 decks120 decks
City of Traitors
5.8%inclusion31 decks539 decks
Kher Keep
5.6%inclusion30 decks539 decks
Minas Tirith
5.2%inclusion28 decks539 decks
Cori Mountain Monastery
5.2%inclusion18 decks349 decks
Mana Artifacts
Sol Ring
88%inclusion473 decks539 decks
Arcane Signet
74%inclusion401 decks539 decks
Talisman of Conviction
38%inclusion203 decks539 decks
Talisman of Hierarchy
31%inclusion37 decks120 decks
Fellwar Stone
30%inclusion164 decks539 decks
Talisman of Indulgence
28%inclusion33 decks120 decks
Talisman of Creativity
24%inclusion39 decks163 decks
Lotus Petal
23%inclusion126 decks539 decks
Talisman of Progress
23%inclusion38 decks163 decks
Boros Signet
23%inclusion124 decks539 decks
Mana Vault
22%inclusion120 decks539 decks
Mox Diamond
17%inclusion91 decks539 decks
Azorius Signet
13%inclusion22 decks163 decks
Izzet Signet
13%inclusion21 decks163 decks
Mox Opal
12%inclusion67 decks539 decks
Timeless Lotus
10%inclusion5 decks49 decks
Mind Stone
10%inclusion54 decks539 decks
Mox Amber
9.5%inclusion51 decks539 decks
Thought Vessel
9.3%inclusion50 decks539 decks
Orzhov Signet
8.3%inclusion10 decks120 decks
Chromatic Lantern
7.8%inclusion42 decks539 decks
Talisman of Unity
6.7%inclusion12 decks179 decks
Rakdos Signet
6.7%inclusion8 decks120 decks
Mana Crypt
6.5%inclusion35 decks539 decks
Springleaf Drum
6.5%inclusion35 decks539 decks
Talisman of Impulse
6.1%inclusion11 decks179 decks
Grim Monolith
5.4%inclusion29 decks539 decks
Talisman of Dominance
5.4%inclusion3 decks56 decks
Lands
Command Tower
89%inclusion480 decks539 decks
Sacred Foundry
56%inclusion301 decks539 decks
Hallowed Fountain
53%inclusion87 decks163 decks
Exotic Orchard
53%inclusion285 decks539 decks
Godless Shrine
53%inclusion63 decks120 decks
Arid Mesa
49%inclusion266 decks539 decks
Steam Vents
49%inclusion80 decks163 decks
Temple Garden
47%inclusion84 decks179 decks
Blood Crypt
46%inclusion55 decks120 decks
Spectator Seating
43%inclusion232 decks539 decks
Battlefield Forge
43%inclusion232 decks539 decks
Stomping Ground
42%inclusion76 decks179 decks
Clifftop Retreat
39%inclusion208 decks539 decks
Training Center
36%inclusion59 decks163 decks
Badlands
36%inclusion43 decks120 decks
Scrubland
36%inclusion43 decks120 decks
Underground Sea
36%inclusion20 decks56 decks
Sea of Clouds
35%inclusion57 decks163 decks
Jungle Shrine
35%inclusion62 decks179 decks
Jetmir's Garden
34%inclusion61 decks179 decks
Vault of Champions
33%inclusion40 decks120 decks
Flooded Strand
33%inclusion178 decks539 decks
Watery Grave
32%inclusion18 decks56 decks
Windswept Heath
32%inclusion173 decks539 decks
Tundra
32%inclusion52 decks163 decks
Volcanic Island
32%inclusion52 decks163 decks
Spara's Headquarters
32%inclusion20 decks63 decks
Breeding Pool
32%inclusion20 decks63 decks
Raugrin Triome
31%inclusion51 decks163 decks
Cinder Glade
31%inclusion56 decks179 decks
Bountiful Promenade
30%inclusion54 decks179 decks
Plateau
29%inclusion159 decks539 decks
Luxury Suite
29%inclusion35 decks120 decks
Wooded Foothills
29%inclusion157 decks539 decks
Canopy Vista
29%inclusion52 decks179 decks
Marsh Flats
29%inclusion155 decks539 decks
Scalding Tarn
29%inclusion154 decks539 decks
Tropical Island
29%inclusion18 decks63 decks
Bayou
28%inclusion15 decks53 decks
Glacial Fortress
27%inclusion44 decks163 decks
Bloodstained Mire
27%inclusion143 decks539 decks
The World Tree
27%inclusion13 decks49 decks
Brushland
26%inclusion47 decks179 decks
Karplusan Forest
26%inclusion47 decks179 decks
City of Brass
26%inclusion141 decks539 decks
Mana Confluence
25%inclusion135 decks539 decks
Spire Garden
25%inclusion44 decks179 decks
Sulfur Falls
25%inclusion40 decks163 decks
Gemstone Caverns
24%inclusion128 decks539 decks
Rockfall Vale
23%inclusion42 decks179 decks