"Don't be fooled. If it were as docile as it looks, it would've died off long ago."
—Yon Basrel, Oran-Rief survivalist

Grazing Gladehart

Landfall — Whenever a land you control enters, you may gain 2 life.

Foundations Jumpstart

The List

Duel Decks: Zendikar vs. Eldrazi

Landfall — Whenever a land enters the battlefield under your control, you may gain 2 life.

Duel Decks: Elspeth vs. Kiora

Commander 2013

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.).