Diath, Walker of the Shadows

Hexproof, double strike
When ever Diath, Walker of the Shadows deals combat damage to a player, that player puts a nonland permanent from their hand into exile. Until the end of this turn, you may cast that card for {x} mana, where X is it's converted mana cost
{1}{u/b}{u/b}: Prevent all combat damage that would be dealt to Diath, Walker of the Shadows this turn.
Uncanny dodge!