Trenzalore Clocktower

a land enters the battlefield — 1,560 cards in the game can cause this (Trenzalore Clocktower is one).

When Trenzalore Clocktower enters:

1. Primeval Bounty — gains you 3 life
2. Toph, Earthbending Master — puts a counter on a permanent
3. Dancing from Dark to Dawn — makes a token
4. Emeria Shepherd — brings a card back
5. Quest for the Necropolis — puts a quest counter on itself
6. Soul Stair Expedition — puts a quest counter on itself
7. Nissa of Shadowed Boughs — puts counters on a permanent
8. Thranduil, Sindarin Liege // Silvan Rally — makes a token
9. Silvan Reveler — returns itself from the graveyard
10. Floral Evoker — puts a +1/+1 counter on itself

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

anything is exiled — 2,497 cards in the game can cause this (Trenzalore Clocktower is one).

1. The War Doctor — When Trenzalore Clocktower is exiled, The War Doctor puts a time counter on itself

a card is drawn — 3,815 cards in the game can cause this (Trenzalore Clocktower is one).

When Trenzalore Clocktower makes a player draw a card:

1. Toothy, Imaginary Friend — puts a +1/+1 counter on itself
2. Temmet, Naktamun's Will — gives +1/+1
3. Niv-Mizzet, Parun — deals 1 damage
4. Aether Syphon — mills a card
5. The Locust God — makes a token
6. Starving Revenant — makes each opponent lose 1 life
7. Diviner's Wand — gets +1/+1
8. Ominous Seas — puts a foreshadow counter on itself
9. Dream Trawler — gets +1/+0
10. Iron Man, Armored Avenger — puts a counter on a creature

57 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 (Trenzalore Clocktower is one).

1. All Will Be One — When Trenzalore Clocktower gets a counter, All Will Be One deals that much damage

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