Sacha

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

{t}, Discard a land: Search your library for a basic land card, put it into your hand, then shuffle your library. And if you don't have a card named "Koya"
in your battlefield, create Koya, a 1/1 legendary green Spirit creature token with "{t}, Tap a land :
Tap target permanent