Voltas Truesong, Vigilant

+1: Until end of turn, Voltas Truesong becomes a 2/4 goliath barbarian with double strike. Prevent all damage that would be dealt to him this turn.
-1: Search your library for a Vigilant, put it in your hand, then shuffle your library.
-8: Put into play all Vigilant in your hand, your library, your graveyard, and exile.