Mercurial Geists

a nontoken Spirit deals combat damage — 725 cards in the game can cause this (Mercurial Geists is one).

1. Millicent, Restless Revenant — When Mercurial Geists deals combat damage, Millicent, Restless Revenant makes a token

a nontoken Spirit enters the battlefield — 727 cards in the game can cause this (Mercurial Geists is one).

1. Baboon Spirit — When Mercurial Geists enters, Baboon Spirit makes a token

a Spirit enters the battlefield — 863 cards in the game can cause this (Mercurial Geists is one).

When Mercurial Geists enters:

1. Mausoleum Wanderer — gets +1/+1
2. Drogskol Cavalry — gains you 2 life
3. Vanguard of the Restless — returns itself from the graveyard
4. Nebelgast Herald — taps a creature an opponent controls

a Spirit creature it boosts — 889 cards in the game can cause this.

1. Battleground Geist — Battleground Geist gives Mercurial Geists bigger stats
2. Long-Forgotten Gohei — Long-Forgotten Gohei gives Mercurial Geists bigger stats

887 other cards cause it too. These are the ones with the most connections.

a Spirit it boosts — 895 cards in the game can cause this.

1. Supreme Phantom — Supreme Phantom gives Mercurial Geists bigger stats

894 other cards cause it too. These are the ones with the most connections.

cast a sorcery — 3,720 cards in the game can cause this.

1. Ral, Monsoon Mage // Ral, Leyline Prodigy — When an instant is cast thanks to Ral, Monsoon Mage // Ral, Leyline Prodigy, Mercurial Geists gets +3/+0
2. Myra the Magnificent — When an instant is cast thanks to Myra the Magnificent, Mercurial Geists gets +3/+0
3. Melek, Izzet Paragon — When an instant is cast thanks to Melek, Izzet Paragon, Mercurial Geists gets +3/+0
4. Renegade Bull — When an instant is cast thanks to Renegade Bull, Mercurial Geists gets +3/+0
5. Mission Briefing — When Mission Briefing is cast, Mercurial Geists gets +3/+0
6. Sorcerous Squall — When Sorcerous Squall is cast, Mercurial Geists gets +3/+0
7. Finale of Promise — When Finale of Promise is cast, Mercurial Geists gets +3/+0
8. Spectral Arcanist — When an instant is cast thanks to Spectral Arcanist, Mercurial Geists gets +3/+0
9. Jace, Vryn's Prodigy // Jace, Telepath Unbound — When an instant is cast thanks to Jace, Vryn's Prodigy // Jace, Telepath Unbound, Mercurial Geists gets +3/+0
10. Diviner of Mist — When an instant is cast thanks to Diviner of Mist, Mercurial Geists gets +3/+0

3,710 other cards cause it too. These are the ones with the most connections.

cast an instant — 3,931 cards in the game can cause this.

1. First Day of Class — When First Day of Class is cast, Mercurial Geists gets +3/+0
2. Wyll's Reversal — When Wyll's Reversal is cast, Mercurial Geists gets +3/+0
3. Return the Favor — When Return the Favor is cast, Mercurial Geists gets +3/+0
4. Theoretical Duplication — When Theoretical Duplication is cast, Mercurial Geists gets +3/+0
5. Blind Fury — When Blind Fury is cast, Mercurial Geists gets +3/+0
6. Pyre Rhymer // Molten Tide — When Pyre Rhymer // Molten Tide is cast, Mercurial Geists gets +3/+0
7. Picklock Prankster // Free the Fae — When Picklock Prankster // Free the Fae is cast, Mercurial Geists gets +3/+0
8. Rite of Undoing — When Rite of Undoing is cast, Mercurial Geists gets +3/+0
9. Will of the Naga — When Will of the Naga is cast, Mercurial Geists gets +3/+0
10. Logic Knot — When Logic Knot is cast, Mercurial Geists gets +3/+0

3,921 other cards cause it too. These are the ones with the most connections.

anything attacks — 17,934 cards in the game can cause this (Mercurial Geists is one).

When Mercurial Geists attacks:

1. Far Fortune, End Boss — deals 1 damage
2. Temmet, Naktamun's Will — draws you 1 card
3. Grim Javelineer — gives +1/+0
4. Invisible Woman — triggers
5. Caesar, Legion's Emperor — sacrifices a creature
6. Guide of Souls — triggers
7. Campsite Cuisine — sacrifices a Food
8. Gossip's Talent — triggers
9. Banon, the Returners' Leader — draws and discards
10. Toph, Earthbending Master — puts a counter on a permanent

111 other cards care about it too. These are the ones with the most connections.

a creature attacks — 17,934 cards in the game can cause this (Mercurial Geists is one).

When Mercurial Geists attacks:

1. Adaptive Omnitool — searches a library
2. Anthem of Rakdos — gives +2/+0
3. Kindred Discovery — draws you 1 card
4. Invasion of New Capenna // Holy Frazzle-Cannon — puts counters on a permanent
5. Chorale of the Void — brings a card back
6. Anim Pakal, Thousandth Moon — puts a +1/+1 counter on itself
7. Saw — sacrifices a creature
8. Gisa's Favorite Shovel — makes an opponent sacrifice a creature
9. Ultima Weapon — kills a creature an opponent controls
10. Total War — kills a creature

180 other cards care about it too. These are the ones with the most connections.

a creature blocks — 17,934 cards in the game can cause this (Mercurial Geists is one).

When Mercurial Geists blocks:

1. Mage Hunters' Onslaught — makes a player lose 1 life
2. Carnage Gladiator — makes a player lose 1 life
3. Barrow-Blade — strips abilities
4. Heat of Battle — deals 1 damage
5. Battle Strain — deals 1 damage
6. Favor of the Woods — gains you 3 life
7. Tide of War — sacrifices a creature
8. Dead-Iron Sledge — kills a creature
9. Dwindle — kills a creature
10. Shield of the Righteous — triggers

18 other cards care about it too. These are the ones with the most connections.

a nontoken creature attacks — 17,934 cards in the game can cause this (Mercurial Geists is one).

When Mercurial Geists attacks:

1. Mardu Ascendancy — makes a token
2. Basri Ket — makes a token
3. Militia's Pride — makes a token

a creature deals combat damage — 17,934 cards in the game can cause this (Mercurial Geists is one).

When Mercurial Geists deals combat damage:

1. Locutus of Borg — makes a token
2. Antagonist Incorporator — makes a token
3. Hive Mind Coprocessor — makes you lose life

194 other cards care about it too. These are the ones with the most connections.

a creature is cast — 18,010 cards in the game can cause this (Mercurial Geists is one).

When Mercurial Geists is cast:

1. Primeval Bounty — makes a token
2. Bloodbond March — brings a card back
3. Dancing from Dark to Dawn — puts that spell's mana value counters on a creature
4. Endrek Sahr, Master Breeder — makes that spell's mana value tokens
5. Summon: Fenrir — it arrives with counters thanks to Summon: Fenrir
6. Summon: Brynhildr — grants haste
7. Skittering Horror — sacrifices itself
8. Skittering Skirge — sacrifices itself
9. Skittering Monstrosity — sacrifices itself
10. Silverback Elder — triggers

81 other cards care about it too. These are the ones with the most connections.

a nontoken creature enters the battlefield — 18,448 cards in the game can cause this (Mercurial Geists is one).

1. Riku of Two Reflections — When Mercurial Geists enters, Riku of Two Reflections makes a token

32 other cards care about it too. These are the ones with the most connections.

a creature enters the battlefield — 19,800 cards in the game can cause this (Mercurial Geists is one).

When Mercurial Geists enters:

1. Slash, Reptile Rampager — deals 2 damage
2. Ray Fillet, Wave Warrior — puts a counter on itself
3. The Neutrinos — gets +1/+0
4. Wingnut, Bat on the Belfry — grants flying, haste and menace
5. Aetherstorm Roc — puts a counter on a permanent you control
6. Raphael, Most Attitude — exiles a card from your library

301 other cards care about it too. These are the ones with the most connections.

anything enters the battlefield — 26,499 cards in the game can cause this (Mercurial Geists is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Mercurial Geists enters, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

39 other cards care about it too. These are the ones with the most connections.