Sigrdrifa, Victory Driver

+1: Search your library for a Warrior creature card, reveal it, put it into your hand, then shuffle your library.
-2: Target Warrior you control gains double strike and lifelink until end of turn. At the beginning of the next end step, sacrifice that creature.
-7: Create a 4/4 white Angel creature token named Valkyrie with flying and first strike for each Warrior creature card in your graveyard.