Isshin, Two Heavens as One

a Human enters the battlefield — 2,784 cards in Isshin's colors can cause this (Isshin is one).

When Isshin, Two Heavens as One enters:

1. General Kudro of Drannith — hits a graveyard
2. Thalia's Lieutenant — puts a +1/+1 counter on itself
3. Champion of the Parish — puts a +1/+1 counter on itself
4. Erkenbrand, Lord of Westfold — gives +1/+0
5. Beregond of the Guard — gives +1/+1
6. Théoden, King of Rohan — grants double strike
7. Vigilante Justice — deals 1 damage
8. Lossarnach Captain — taps a creature an opponent controls

anything attacks — 9,901 cards in Isshin's colors can cause this (Isshin is one).

When Isshin, Two Heavens as One attacks:

1. Far Fortune, End Boss — deals 1 damage
2. Grim Javelineer — gives +1/+0
3. ED-E, Lonesome Eyebot — puts a quest counter on itself
4. Surgical Suite // Hospital Room — puts a counter on a creature
5. Caesar, Legion's Emperor — sacrifices a creature
6. Guide of Souls — triggers
7. Banon, the Returners' Leader — draws and discards
8. Three Dog, Galaxy News DJ — sacrifices an Aura
9. Inti, Seneschal of the Sun — triggers
10. Gut, True Soul Zealot — sacrifices a creature or artifact

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

a creature attacks — 9,901 cards in Isshin's colors can cause this (Isshin is one).

When Isshin, Two Heavens as One attacks:

1. Adaptive Omnitool — searches a library
2. Anthem of Rakdos — gives +2/+0
3. Invasion of New Capenna // Holy Frazzle-Cannon — puts counters on a permanent
4. Chorale of the Void — brings a card back
5. Anim Pakal, Thousandth Moon — puts a +1/+1 counter on itself
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
9. Total War — kills a creature
10. The Spear of Leonidas — triggers

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

a creature blocks — 9,901 cards in Isshin's colors can cause this (Isshin is one).

When Isshin, Two Heavens as One 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. Battle Strain — deals 1 damage
6. Noble Stand — gains you 2 life
7. Battle Cry — gives +0/+1
8. Tide of War — sacrifices a creature
9. Dead-Iron Sledge — kills a creature

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

a nontoken creature attacks — 9,901 cards in Isshin's colors can cause this (Isshin is one).

When Isshin, Two Heavens as One attacks:

1. Mardu Ascendancy — makes a token
2. Basri Ket — makes a token
3. Militia's Pride — makes a token

a creature deals combat damage — 9,901 cards in Isshin's colors can cause this (Isshin is one).

When Isshin, Two Heavens as One deals combat damage:

1. Antagonist Incorporator — makes a token
2. Hive Mind Coprocessor — makes you lose life

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

a creature is cast — 9,939 cards in Isshin's colors can cause this (Isshin is one).

When Isshin, Two Heavens as One is cast:

1. Endrek Sahr, Master Breeder — makes that spell's mana value tokens
2. Summon: Brynhildr — grants haste
3. God-Eternal Oketra — makes a token
4. Skittering Horror — sacrifices itself
5. Skittering Skirge — sacrifices itself
6. Skittering Monstrosity — sacrifices itself
7. Oltec Matterweaver — triggers
8. Pure Reflection — kills a Reflection
9. Abigale, Poet Laureate // Heroic Stanza — becomes prepared
10. Bygone Bishop — triggers

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

a nontoken creature enters the battlefield — 10,269 cards in Isshin's colors can cause this (Isshin is one).

1. Angelic Sell-Sword — When Isshin, Two Heavens as One enters, Angelic Sell-Sword makes a token

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

a creature enters the battlefield — 11,072 cards in Isshin's colors can cause this (Isshin is one).

When Isshin, Two Heavens as One enters:

1. Slash, Reptile Rampager — deals 2 damage
2. Gimli of the Glittering Caves — puts counters on a permanent
3. The Neutrinos — gets +1/+0
4. Wingnut, Bat on the Belfry — grants flying, haste and menace
5. Aetherstorm Roc — puts a counter on a permanent you control
6. Raphael, Most Attitude — exiles a card from your library

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

anything enters the battlefield — 15,360 cards in Isshin's colors can cause this (Isshin is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Isshin, Two Heavens as One enters, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

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