Guska, Tiny Necromancer

Prepare Body! — {x}{b}, Exile a creature card with converted mana value x or less from your graveyard.

Return To Me! — {g},{t}, Until end of turn, you
may cast any number of creature spells from among cards exiled with Guska. For each {1} of a spell’s total cost, you may pay 2 life rather than pay that mana. Creatures cast with this ability gain Haste until end of turn.