Drest, Somberwald Hermit

+1: Until end of turn, Drest, Somberwald Hermit becomes a 3/3 green Shapeshifter creature with changeling, indestructible, and haste.
-1: Until your next turn, unspent mana doesn't empty from your mana pool as steps and phases end.
-7: Gain Emblem: "Play with the top card of your deck revealed. If that card is a creature you may exile a creature you control and put it into play"