Jenova, Ancient Calamity

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

1. Scurry Oak — When Scurry Oak gets a counter thanks to Jenova, Ancient Calamity, it makes a token
2. Fathom Mage — When Fathom Mage gets a counter thanks to Jenova, Ancient Calamity, it draws you 1 card
3. Hollowmurk Siege — When a creature gets a counter thanks to Jenova, Ancient Calamity, Hollowmurk Siege draws you 1 card
4. Ant-Man, Colony Commander — When a creature gets a counter thanks to Jenova, Ancient Calamity, Ant-Man, Colony Commander makes a token
5. Earth Kingdom General — When a creature gets a counter thanks to Jenova, Ancient Calamity, Earth Kingdom General gains you that much life
6. Casey Jones, Back Alley Brute — When a creature gets a counter thanks to Jenova, Ancient Calamity, Casey Jones, Back Alley Brute deals that much damage
7. Generous Patron — When a creature gets a counter thanks to Jenova, Ancient Calamity, Generous Patron draws you 1 card
8. Shalai and Hallar — When a creature gets a counter thanks to Jenova, Ancient Calamity, Shalai and Hallar deals that much damage
9. Danny Pink — When a creature gets a counter thanks to Jenova, Ancient Calamity, Danny Pink draws you 1 card
10. Enduring Scalelord — When a creature gets a counter thanks to Jenova, Ancient Calamity, Enduring Scalelord puts a +1/+1 counter on itself

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

a card is drawn — 3,815 cards in the game can cause this (Jenova is one).

When Jenova, Ancient Calamity makes a player draw a card:

1. Temmet, Naktamun's Will — gives +1/+1
2. Niv-Mizzet, Parun — deals 1 damage
3. Aether Syphon — mills a card
4. The Locust God — makes a token
5. Starving Revenant — makes each opponent lose 1 life
6. Diviner's Wand — gets +1/+1
7. Ominous Seas — puts a foreshadow counter on itself
8. Dream Trawler — gets +1/+0
9. Iron Man, Armored Avenger — puts a counter on a creature
10. The Astonishing Ant-Man — puts a +1/+1 counter on itself

57 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 (Jenova is one).

1. All Will Be One — When a creature gets a counter thanks to Jenova, Ancient Calamity, All Will Be One deals that much damage
2. Lonis, Genetics Expert — When Lonis, Genetics Expert gets a counter thanks to Jenova, Ancient Calamity, it triggers

7 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 (Jenova is one).

When Jenova, Ancient Calamity attacks:

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

115 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 (Jenova is one).

When Jenova, Ancient Calamity 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

181 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 (Jenova is one).

When Jenova, Ancient Calamity blocks:

1. Mage Hunters' Onslaught — makes a player lose 1 life
2. Carnage Gladiator — makes a player lose 1 life
3. Tide of War — sacrifices a creature
4. Dead-Iron Sledge — kills a creature
5. Dwindle — kills a creature
6. Shield of the Righteous — triggers

22 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 (Jenova is one).

When Jenova, Ancient Calamity 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 (Jenova is one).

When Jenova, Ancient Calamity enters:

1. Slash, Reptile Rampager — deals 2 damage
2. Gimli of the Glittering Caves — puts counters on a permanent
3. Ray Fillet, Wave Warrior — puts a counter on itself
4. Legolas Greenleaf — puts a counter on a permanent
5. The Neutrinos — gets +1/+0
6. Wingnut, Bat on the Belfry — grants flying, haste and menace
7. Aetherstorm Roc — puts a counter on a permanent you control
8. 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 (Jenova is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Jenova, Ancient Calamity 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.