Forest

Landfall — Whenever a land you control enters, add one mana of any color.

GU: Target creature can't be blocked this turn. If that creature is a Snake, it gets +2/+2 until end of turn.

Flying Whenever an opponent draws a card except the first one they draw in each of their draw steps, create a 1/1 green Snake creature token. Whenever Xyris deals combat damage to a player, you and that player each draw that many cards.

Sacrifice this creature: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.