Howlgeist

hits creature — 2,298 cards in the game can cause this (Howlgeist is one).

1. Jalira, Master Polymorphist — Jalira, Master Polymorphist can put Howlgeist onto the battlefield from your library
2. Kethek, Crucible Goliath — Kethek, Crucible Goliath can put Howlgeist onto the battlefield from your library
3. Polymorph — Polymorph can put Howlgeist onto the battlefield from your library
4. Birthing Ritual — Birthing Ritual can put Howlgeist onto the battlefield from your library
5. Industrial Advancement — Industrial Advancement can put Howlgeist onto the battlefield from your library
6. Killer Instinct — Killer Instinct can put Howlgeist onto the battlefield from your library
7. Arthur, Marigold Knight — Arthur, Marigold Knight can put Howlgeist onto the battlefield from your library
8. Proteus Staff — Proteus Staff can put Howlgeist onto the battlefield from your library
9. Synthetic Destiny — Synthetic Destiny can put Howlgeist onto the battlefield from your library
10. Divergent Transformations — Divergent Transformations can put Howlgeist onto the battlefield from your library

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

a Wolf deals combat damage — 155 cards in the game can cause this (Howlgeist is one).

1. Tovolar, Dire Overlord // Tovolar, the Midnight Scourge — When Howlgeist deals combat damage, Tovolar, Dire Overlord // Tovolar, the Midnight Scourge draws you 1 card

a Wolf enters the battlefield — 198 cards in the game can cause this (Howlgeist is one).

When Howlgeist enters:

1. Tolsimir, Friend to Wolves — gains you 3 life
2. Chief of the Wilds — puts 2 +1/+1 counters on itself

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

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

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

1. Baboon Spirit — When Howlgeist enters, Baboon Spirit makes a token

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

When Howlgeist 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 creature gets a counter — 2,691 cards in the game can cause this (Howlgeist is one).

When Howlgeist gets a counter:

1. Hollowmurk Siege — draws you 1 card
2. Ant-Man, Colony Commander — makes a token
3. Earth Kingdom General — gains you that much life
4. Casey Jones, Back Alley Brute — deals that much damage
5. Shalai and Hallar — deals that much damage
6. Danny Pink — draws you 1 card
7. Enduring Scalelord — puts a +1/+1 counter on itself
8. Mikey & Leo, Chaos & Order — draws you 1 card
9. Knight of Wundagore — puts a +1/+1 counter on itself
10. Moss-Pit Skeleton — returns itself from the graveyard

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

anything gets a counter — 4,415 cards in the game can cause this (Howlgeist is one).

1. All Will Be One — When Howlgeist gets a counter, All Will Be One deals that much damage

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

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

When Howlgeist 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

114 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 (Howlgeist is one).

When Howlgeist 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

183 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 (Howlgeist is one).

When Howlgeist blocks:

1. Tide of War — sacrifices a creature
2. Dead-Iron Sledge — kills a creature

26 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 (Howlgeist is one).

When Howlgeist enters:

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

300 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 (Howlgeist is one).

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

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