Leonardo, Sewer Samurai

a Turtle deals combat damage — 146 cards in the game can cause this (Leonardo is one).

1. Heroes in a Half Shell — When Leonardo, Sewer Samurai deals combat damage, Heroes in a Half Shell puts a counter on a permanent

a Turtle enters the battlefield — 148 cards in the game can cause this (Leonardo is one).

1. April O'Neil, Live on the Scene — When Leonardo, Sewer Samurai enters, April O'Neil, Live on the Scene triggers

a Ninja deals combat damage — 165 cards in the game can cause this (Leonardo is one).

When Leonardo, Sewer Samurai deals combat damage:

1. Ingenious Infiltrator — draws you 1 card
2. Yuriko, the Tiger's Shadow — makes an opponent lose life

1 other card cares about it too. These are the ones with the most connections.

a Ninja creature deals combat damage — 165 cards in the game can cause this (Leonardo is one).

1. Prosperous Thief — When Leonardo, Sewer Samurai deals combat damage, Prosperous Thief makes a token

a Ninja enters the battlefield — 172 cards in the game can cause this (Leonardo is one).

When Leonardo, Sewer Samurai enters:

1. Smoke Shroud — returns itself from the graveyard
2. Quintessential Katana — triggers

1 other card cares about it too. These are the ones with the most connections.

a Mutant attacks — 280 cards in the game can cause this (Leonardo is one).

1. Wolverine, Claws Out — When Leonardo, Sewer Samurai attacks, Wolverine, Claws Out makes your creatures bigger

a Mutant enters the battlefield — 286 cards in the game can cause this (Leonardo is one).

When Leonardo, Sewer Samurai enters:

1. Genghis Frog — makes a token
2. X-23, Deadly Weapon — puts a counter on a permanent

1 other card cares about it too. These are the ones with the most connections.

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

When a creature leaves a graveyard thanks to Leonardo, Sewer Samurai:

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 (Leonardo is one).

When a creature leaves a graveyard thanks to Leonardo, Sewer Samurai:

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

1. All Will Be One — When a permanent gets a counter thanks to Leonardo, Sewer Samurai, 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 (Leonardo is one).

When Leonardo, Sewer Samurai 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 (Leonardo is one).

When Leonardo, Sewer Samurai 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

182 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 (Leonardo is one).

1. Tide of War — When Leonardo, Sewer Samurai blocks, Tide of War sacrifices a creature

27 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 (Leonardo is one).

When Leonardo, Sewer Samurai enters:

1. Lonis, Genetics Expert — puts a counter on itself
2. Slash, Reptile Rampager — deals 2 damage
3. Gimli of the Glittering Caves — puts counters on a permanent
4. Ray Fillet, Wave Warrior — puts a counter on itself
5. Legolas Greenleaf — puts a counter on a permanent
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

299 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 (Leonardo is one).

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

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