Genesis

a creature leaves a graveyard — 1,302 cards in the game can cause this (Genesis is one).

When Genesis leaves a graveyard:

1. Grim Reaper's Scythe — makes a token
2. Syr Konrad, the Grim — deals 1 damage
3. Cyan, Vengeful Samurai — puts a +1/+1 counter on itself
4. Along the Crooked Way — puts a counter on a Goblin or Army
5. Skeleton Crew — makes a token
6. Desecrated Tomb — makes a token
7. Chalk Outline — makes a token
8. Insidious Roots — makes a token
9. Undead Hand Ninja — makes each opponent lose 1 life
10. Rot Farm Mortipede — gets +1/+0

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

anything leaves a graveyard — 2,503 cards in the game can cause this (Genesis is one).

When Genesis leaves a graveyard:

1. Blastoneuron — makes each opponent lose 1 life
2. Defiled Crypt // Cadaver Lab — makes a token
3. Teval, the Balanced Scale — makes a token
4. Hologram Stalker — makes a token
5. Tormod, the Desecrator — makes a token
6. Quintorius, Field Historian — makes a token
7. Garrison Excavator — makes a token
8. Amzu, Swarm's Hunger — makes a token
9. Kirol, History Buff // Pack a Punch — becomes prepared
10. Teval's Judgment — triggers

13 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 (Genesis is one).

When Genesis 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

112 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 (Genesis is one).

When Genesis 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. Jolene, Plundering Pugilist — makes a token
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 (Genesis is one).

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

When Genesis 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 (Genesis is one).

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

302 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 (Genesis is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Genesis 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.