Throne Defender and Watcher

First strike, Vigilance

Two as One(The first time this creature is sent to the Graveyard it is not, instead place it back onto the battlefield with a Death counter on it. When this creature is sent to the Graveyard with a death counter exile it instead.)

{u}{u}: Deal 2 damage to yourself, counter target spell.

{r}: Deal 2 damage to yourself, +2/+2, until the end of your turn.