Traia, Cataclysmic Intellect

Flying, prowess, hexproof
Creatures your opponents control lose prowess
and hexproof, and can't gain prowess or
hexproof.
{r/w}{u/r}{w/u},{t}, shuffle your hand into your library:
target creature you control gains your choice of prowess or hexproof for the rest of the game,
and Traia doesn't untap during your untap step.