Plains

Soul Warden

Whenever another creature enters, you gain 1 life.

Narset, Enlightened Master

First strike, hexproof
Whenever Narset, Enlightened Master attacks, exile the top four cards of your library. Until end of turn, you may cast noncreature spells from among those cards without paying their mana costs.

Yavimaya, Cradle of Growth

Each land is a Forest in addition to its other land types.

Sol Ring

Highland Forest

({T}: Add {R} or {G}.)
Highland Forest enters tapped.

Devoted Druid

{T}: Add {G}.
Put a -1/-1 counter on Devoted Druid: Untap Devoted Druid.