Their Enclave overrun, the merfolk took refuge within beauty.

Retreat to Coralhelm

Landfall — Whenever a land you control enters, choose one —
• You may tap or untap target creature.
• Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Duskmourn: House of Horror Commander

Secret Lair Drop

The List

Battle for Zendikar

Landfall — Whenever a land enters the battlefield under your control, choose one —• You may tap or untap target creature.• Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

A landfall ability triggers whenever a land enters the battlefield under your control for any reason. It triggers whenever you play a land, as well as whenever a spell or ability puts a land onto the battlefield under your control.

If the ability has an additional or replacement effect that depends on the land having a certain basic land type, the ability will check that land's type as the ability resolves. If, at that time, the land that entered the battlefield is no longer on the battlefield, use its types when it left the battlefield to determine what happens.

When a land enters the battlefield under your control, each landfall ability of the permanents you control will trigger. You can put them on the stack in any order. The last ability you put on the stack will be the first one to resolve.