Heyna, Plane Deceiver

When Heyna, Plane Deceiver enters the battlefield, you may search your library for any number of basic land cards and exile them. If you do, shuffle your library.
{1}{g}{w}, {t}: Put a land card exiled with Heyna, Plane Deceiver onto the battlefield. Until end of turn, that land becomes an X/X elemental creature with haste where X is the number of basic lands you control. It's still a land.