"Yavimaya is one being—one vastness of rippling leaves, one deepness of roots, and one chatter of animals—of which I am one part."

Tatyova, Benthic Druid

Landfall — Whenever a land you control enters, you gain 1 life and draw a card.

Foundations

Duskmourn: House of Horror Commander

Modern Horizons 3 Commander

Landfall — Whenever a land enters the battlefield under your control, you gain 1 life and draw a card.

The Lost Caverns of Ixalan Commander

A landfall ability doesn't trigger if a permanent already on the battlefield becomes a land.

A landfall ability triggers whenever a land you control enters 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.

Whenever a land you control enters, 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 (As a result, you can have those abilities resolve in the order of your choosing.).