Hidetsugu and Kairi

a Demon enters the battlefield — 187 cards in Hidetsugu and Kairi's colors can cause this (Hidetsugu and Kairi is one).

1. Blood Speaker — When Hidetsugu and Kairi enters, Blood Speaker returns itself from the graveyard

a Dragon attacks — 101 cards in Hidetsugu and Kairi's colors can cause this (Hidetsugu and Kairi is one).

1. Silumgar, the Drifting Death — When Hidetsugu and Kairi attacks, Silumgar, the Drifting Death shrinks a creature by -1/-1

a Dragon enters the battlefield — 108 cards in Hidetsugu and Kairi's colors can cause this (Hidetsugu and Kairi is one).

When Hidetsugu and Kairi enters:

1. Bladewing's Thrall — returns itself from the graveyard
2. Dragon's Hoard — puts a gold counter on itself
3. Corroding Dragonstorm — triggers
4. Roiling Dragonstorm — triggers

life is lost — 1,363 cards in Hidetsugu and Kairi's colors can cause this (Hidetsugu and Kairi is one).

When a permanent makes a player lose life thanks to Hidetsugu and Kairi:

1. Aether Syphon — raises your speed
2. Vnwxt, Verbose Host — raises your speed
3. Slick Imitator — raises your speed
4. Hour of Victory — raises your speed
5. Walking Sarcophagus — raises your speed
6. Gas Guzzler — raises your speed
7. Gastal Raider — raises your speed
8. Risen Necroregent — raises your speed
9. The Master of Lake-town — mills a card
10. Emet-Selch of the Third Seat — brings a card back

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

a card is drawn — 2,047 cards in Hidetsugu and Kairi's colors can cause this (Hidetsugu and Kairi is one).

When Hidetsugu and Kairi makes a player draw a card:

1. Starving Revenant — makes each opponent lose 1 life
2. Diviner's Wand — gets +1/+1
3. Ominous Seas — puts a foreshadow counter on itself
4. Iron Man, Armored Avenger — puts a counter on a creature
5. Psychosis Crawler — makes each opponent lose 1 life
6. Lyla, Holographic Assistant — puts a counter on a creature
7. Data, New Life — puts a +1/+1 counter on itself
8. Chasm Skulker — puts a +1/+1 counter on itself
9. Nadir Kraken — puts a +1/+1 counter on itself
10. Teferi, Temporal Pilgrim — puts a loyalty counter on itself

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

a creature attacks — 6,258 cards in Hidetsugu and Kairi's colors can cause this (Hidetsugu and Kairi is one).

When Hidetsugu and Kairi attacks:

1. Adaptive Omnitool — searches a library
2. Kindred Discovery — draws you 1 card
3. Chorale of the Void — brings a card back
4. Teo, Spirited Glider — draws you 1 card
5. Shadow Puppeteers — turns something into a creature
6. Screaming Swarm — mills a card
7. Imperious Mindbreaker — mills a card
8. Saw — sacrifices a creature
9. Gisa's Favorite Shovel — makes an opponent sacrifice a creature
10. Ultima Weapon — kills a creature an opponent controls

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

anything attacks — 6,258 cards in Hidetsugu and Kairi's colors can cause this (Hidetsugu and Kairi is one).

When Hidetsugu and Kairi attacks:

1. Grim Javelineer — gives +1/+0
2. ED-E, Lonesome Eyebot — puts a quest counter on itself
3. Fire Navy Trebuchet — makes a token
4. Madame Web, Clairvoyant — mills a card
5. Dimir Strandcatcher — surveils
6. Stensian Sanguinist // Exsanguinate — grants deathtouch
7. Rev, Tithe Extractor — grants deathtouch
8. Gossip's Talent — triggers
9. Krydle of Baldur's Gate — triggers
10. Alora, Merry Thief — triggers

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

a creature blocks — 6,258 cards in Hidetsugu and Kairi's colors can cause this (Hidetsugu and Kairi is one).

When Hidetsugu and Kairi blocks:

1. Mage Hunters' Onslaught — makes a player lose 1 life
2. Barrow-Blade — strips abilities
3. Dead-Iron Sledge — kills a creature
4. Dwindle — kills a creature

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

a creature deals combat damage — 6,258 cards in Hidetsugu and Kairi's colors can cause this (Hidetsugu and Kairi is one).

1. Hive Mind Coprocessor — When Hidetsugu and Kairi deals combat damage, Hive Mind Coprocessor makes you lose life

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

a creature is cast — 6,287 cards in Hidetsugu and Kairi's colors can cause this (Hidetsugu and Kairi is one).

When Hidetsugu and Kairi is cast:

1. Endrek Sahr, Master Breeder — makes that spell's mana value tokens
2. Oketra's Monument — makes a token
3. Kozilek's Unsealing — makes 2 tokens
4. Skittering Horror — sacrifices itself
5. Skittering Skirge — sacrifices itself
6. Skittering Monstrosity — sacrifices itself
7. Hazoret's Monument — draws and discards
8. Aether Barrier — makes a player sacrifice a permanent

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

a creature enters the battlefield — 6,953 cards in Hidetsugu and Kairi's colors can cause this (Hidetsugu and Kairi is one).

1. Ray Fillet, Wave Warrior — When Hidetsugu and Kairi enters, Ray Fillet, Wave Warrior puts a counter on itself

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