Island

an Island enters the battlefield — 64 cards in the game can cause this (Island is one).

1. Staff of the Mind Magus — When Island enters, Staff of the Mind Magus gains you 1 life

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

1. Primeval Bounty — When Island enters, Primeval Bounty gains you 3 life
2. Toph, Earthbending Master — When Island enters, Toph, Earthbending Master puts a counter on a permanent
3. Dancing from Dark to Dawn — When Island enters, Dancing from Dark to Dawn makes a token
4. Emeria Shepherd — When Island enters, Emeria Shepherd brings a card back
5. Quest for the Necropolis — When Island enters, Quest for the Necropolis puts a quest counter on itself
6. Soul Stair Expedition — When Island enters, Soul Stair Expedition puts a quest counter on itself
7. Nissa of Shadowed Boughs — When Island enters, Nissa of Shadowed Boughs puts counters on a permanent
8. Thranduil, Sindarin Liege // Silvan Rally — When Island enters, Thranduil, Sindarin Liege // Silvan Rally makes a token
9. Silvan Reveler — When Island enters, Silvan Reveler returns itself from the graveyard
10. Floral Evoker — When Island enters, 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 enters the battlefield — 26,499 cards in the game can cause this (Island is one).

1. Nature's Wrath — When Island enters, Nature's Wrath makes a player sacrifice an Island or permanent

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