Tatyova, Steward of Tides | 222 | Dominaria United

Set: Dominaria United
Rarity: U
#: 222
Creature Type or Sub Type: Legendary Creature — Merfolk Druid
P: 3
T: 3
Rules Text Contains: 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 3/3 Elemental creature with haste. It's still a land.