A-Tatyova, Steward of Tides{G}{G}{U}

Legendary Creature — Merfolk Druid

Land creatures you control have flying.
Whenever a land enters the battlefield under your control, if you control seven or more lands, up to one target land you control becomes a 4/4 Elemental creature with haste. It's still a land.

4/4

Illustrated by Howard Lyon