Ravnica at War

a permanent is exiled — 69 cards in the game can cause this (Ravnica at War is one).

1. Hero of Bretagard — When a permanent is exiled thanks to Ravnica at War, Hero of Bretagard puts that many counters on a permanent

a nontoken permanent leaves the battlefield — 313 cards in the game can cause this (Ravnica at War is one).

1. Genku, Future Shaper — When a permanent leaves the battlefield thanks to Ravnica at War, Genku, Future Shaper makes a token

a permanent leaves the battlefield — 315 cards in the game can cause this (Ravnica at War is one).

When a permanent leaves the battlefield thanks to Ravnica at War:

1. Super Shredder — puts a +1/+1 counter on itself
2. Nefarious Imp — scries

anything is exiled — 2,497 cards in the game can cause this (Ravnica at War is one).

1. The War Doctor — When a permanent is exiled thanks to Ravnica at War, The War Doctor puts a time counter on itself

a sorcery is cast — 3,720 cards in the game can cause this (Ravnica at War is one).

When Ravnica at War is cast:

1. Spellweaver Volute — copies a spell
2. Lilah, Undefeated Slickshot — gets +1/+1
3. Niblis of Frost — gets +1/+1
4. Primeval Bounty — puts 3 counters on a creature
5. Tetsuko Umezawa, Pursuer — gets +1/+1
6. Thor, God of Thunder — deals that spell's mana value damage
7. Krile Baldesion — brings a card back
8. Summon: Good King Mog XII — makes a token
9. Kykar, Wind's Fury — makes a token
10. Blood Funnel — sacrifices a creature

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

anything is cast — 31,128 cards in the game can cause this (Ravnica at War is one).

When Ravnica at War is cast:

1. Windrider Wizard — draws you 1 card
2. Relic Amulet — puts a charge counter on itself
3. Rockslide Sorcerer — deals 1 damage
4. Umara Wizard // Umara Skyfalls — grants flying
5. Alania, Divergent Storm — makes an opponent draw 1 card
6. Umara Mystic — gets +2/+0
7. Master of Winds — triggers

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