The Flood of Mars

a Horror deals combat damage — 382 cards in the game can cause this (The Flood of Mars is one).

1. Captain N'ghathrod — When The Flood of Mars deals combat damage, Captain N'ghathrod mills a card

a Zombie deals combat damage — 657 cards in the game can cause this (The Flood of Mars is one).

1. Undead Alchemist — When The Flood of Mars deals combat damage, Undead Alchemist mills a card

a Zombie attacks — 657 cards in the game can cause this (The Flood of Mars is one).

1. Varina, Lich Queen — When The Flood of Mars attacks, Varina, Lich Queen draws you that many cards

a nontoken Zombie enters the battlefield — 661 cards in the game can cause this (The Flood of Mars is one).

1. Necroduality — When The Flood of Mars enters, Necroduality makes a token

a Zombie enters the battlefield — 795 cards in the game can cause this (The Flood of Mars is one).

When The Flood of Mars enters:

1. Noxious Ghoul — shrinks a creature by -1/-1
2. Geralf, the Fleshwright — puts counters on a permanent
3. Wayward Servant — makes each opponent lose 1 life
4. Champion of the Perished — puts a +1/+1 counter on itself
5. Mummy Paramount — gets +1/+1
6. Unconventional Tactics — returns itself from the graveyard
7. Binding Mummy — taps a creature or artifact

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

When a creature or land gets a counter thanks to The Flood of Mars:

1. Hollowmurk Siege — draws you 1 card
2. Generous Patron — draws you 1 card
3. Danny Pink — draws you 1 card
4. Bold Plagiarist — puts counters on a permanent
5. Mikey & Leo, Chaos & Order — draws you 1 card
6. Kros, Defense Contractor — triggers
7. Rikku, Resourceful Guardian — triggers

36 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 (The Flood of Mars is one).

1. All Will Be One — When a creature or land gets a counter thanks to The Flood of Mars, 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 (The Flood of Mars is one).

When The Flood of Mars 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

113 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 (The Flood of Mars is one).

When The Flood of Mars 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

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 (The Flood of Mars is one).

When The Flood of Mars 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 (The Flood of Mars is one).

When The Flood of Mars 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 (The Flood of Mars is one).

When The Flood of Mars 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 (The Flood of Mars is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When The Flood of Mars 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.