Reya Dawnbringer

Nonbasic lands don't untap during their controllers' untap steps.

T: Add C. 2, T: This land becomes a copy of target land, except it has this ability.

T, Sacrifice this creature: Add CC. If any of that mana is spent on a creature spell, it gains haste until end of turn. (That creature can attack and T as soon as it comes under your control.)

Search your library for a card, put that card into your graveyard, then shuffle.