Cubwarden

a Cat deals combat damage — 395 cards in the game can cause this (Cubwarden is one).

1. Feline Sovereign — When Cubwarden deals combat damage, Feline Sovereign kills an artifact or enchantment an opponent controls

a Cat attacks — 395 cards in the game can cause this (Cubwarden is one).

1. Arahbo, Roar of the World — When Cubwarden attacks, Arahbo, Roar of the World grants trample

a nontoken Cat enters the battlefield — 396 cards in the game can cause this (Cubwarden is one).

1. Arahbo, the First Fang — When Cubwarden enters, Arahbo, the First Fang makes a token

a Cat enters the battlefield — 414 cards in the game can cause this (Cubwarden is one).

When a Cat enters thanks to Cubwarden:

1. Qasali Slingers — kills an artifact or enchantment an opponent controls
2. Kemba, Kha Enduring — triggers

life is gained — 2,076 cards in the game can cause this (Cubwarden is one).

When Cubwarden gains life:

1. Dina, Soul Steeper — makes each opponent lose 1 life
2. Marina Vendrell's Grimoire — draws you that many cards
3. South Wind Avatar — makes each opponent lose 1 life
4. Rodolf Duskbringer — grants indestructible
5. Fiendish Panda — puts a +1/+1 counter on itself
6. Veinwitch Coven — brings a card back
7. Cleric Class — puts a counter on a creature
8. Lich's Mastery — draws you that many cards
9. Wall of Limbs — puts a +1/+1 counter on itself
10. Ratchet, Field Medic // Ratchet, Rescue Racer — triggers

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

a creature token enters the battlefield — 2,799 cards in the game can cause this (Cubwarden is one).

When a Cat enters thanks to Cubwarden:

1. Securitron Squadron — puts a counter on a permanent
2. Anointer Priest — gains you 1 life
3. Nesting Dovehawk — puts a +1/+1 counter on itself

a creature token is created — 2,799 cards in the game can cause this (Cubwarden is one).

1. Staff of the Storyteller — When Cubwarden makes a Cat token, Staff of the Storyteller puts a story counter on itself

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

a token enters the battlefield — 3,710 cards in the game can cause this (Cubwarden is one).

When a Cat enters thanks to Cubwarden:

1. Baron Bertram Graywater — makes a token
2. Marneus Calgar — draws you 1 card
3. Belladonna Took — gains you 1 life
4. Kambal, Profiteering Mayor — makes each opponent lose 1 life
5. Lucy MacLean, Positively Armed — makes a token
6. Mister Fantastic, Reed Richards — draws you 1 card
7. Cloakwood Swarmkeeper — puts a +1/+1 counter on itself
8. Woodland Champion — puts that many +1/+1 counters on itself
9. Leonardo, the Balance — puts a counter on a creature
10. Spiritcall Enthusiast // Scrollboost — becomes prepared

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

a token is created — 3,711 cards in the game can cause this (Cubwarden is one).

When Cubwarden makes a Cat token:

1. Akim, the Soaring Wind — makes a token
2. Idol of Oblivion — draws you 1 card
3. Rosie Cotton of South Lane — puts a counter on a permanent
4. Mirkwood Bats — makes each opponent lose 1 life

17 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 (Cubwarden is one).

When Cubwarden 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

127 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 (Cubwarden is one).

When Cubwarden 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

196 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 (Cubwarden is one).

When Cubwarden blocks:

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

28 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 (Cubwarden is one).

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

336 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 (Cubwarden is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When a Cat enters thanks to Cubwarden, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

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