Tyria of the Dualists

Hexproof
{u/r}{u/r}: Tap target creature with power less than or equal to the number of instant and sorcery cards in your graveyard. It doesn't untap during its controller's untap step.
At the beginning of your upkeep, untap any number of target creatures. For each creature untapped this way, Tyria deals 2 damage to that creature's controller.