Thundermare

hits creature — 2,298 cards in the game can cause this.

1. Jalira, Master Polymorphist — Jalira, Master Polymorphist can put Thundermare onto the battlefield from your library
2. Kethek, Crucible Goliath — Kethek, Crucible Goliath can put Thundermare onto the battlefield from your library
3. Polymorph — Polymorph can put Thundermare onto the battlefield from your library
4. Birthing Ritual — Birthing Ritual can put Thundermare onto the battlefield from your library
5. Industrial Advancement — Industrial Advancement can put Thundermare onto the battlefield from your library
6. Killer Instinct — Killer Instinct can put Thundermare onto the battlefield from your library
7. Arthur, Marigold Knight — Arthur, Marigold Knight can put Thundermare onto the battlefield from your library
8. Proteus Staff — Proteus Staff can put Thundermare onto the battlefield from your library
9. Synthetic Destiny — Synthetic Destiny can put Thundermare onto the battlefield from your library
10. Divergent Transformations — Divergent Transformations can put Thundermare onto the battlefield from your library
11. Transmogrify — Transmogrify can put Thundermare onto the battlefield from your library
12. Lukka, Coppercoat Outcast — Lukka, Coppercoat Outcast can put Thundermare onto the battlefield from your library
13. Identity Echo — Identity Echo can put Thundermare onto the battlefield from your library

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

a creature becomes tapped — 565 cards in the game can cause this (Thundermare is one).

When a creature becomes tapped thanks to Thundermare:

1. Unctus, Grand Metatect — draws you 1 card
2. Sharae of Numbing Depths — draws you 1 card
3. Rewrite History — draws you 1 card
4. Stinging Licid — deals 2 damage
5. Gideon's Avenger — puts a +1/+1 counter on itself
6. Icewrought Sentry — gets +2/+1
7. Hawkeye's Bow — deals 1 damage
8. Cryoshatter — kills a creature
9. Don't Move — kills a creature
10. Hylda of the Icy Crown — triggers

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

an Elemental enters the battlefield — 754 cards in the game can cause this (Thundermare is one).

When Thundermare enters:

1. Champion of the Path — deals its power damage
2. Risen Reef — puts a land onto the battlefield

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

When Thundermare 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 (Thundermare is one).

When Thundermare 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. Saw — sacrifices a creature
7. Gisa's Favorite Shovel — makes an opponent sacrifice a creature
8. Ultima Weapon — kills a creature an opponent controls
9. Path of Mettle // Metzali, Tower of Triumph — triggers
10. Total War — kills a creature

184 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 (Thundermare is one).

When Thundermare 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. Tide of War — sacrifices a creature
6. Dead-Iron Sledge — kills a creature
7. Dwindle — kills a creature
8. Shield of the Righteous — triggers

20 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 (Thundermare is one).

When Thundermare attacks:

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

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

When Thundermare 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 (Thundermare is one).

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

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