Colin Andrew, the Warmage

Double Strike, vigilance, Persist
{w/u}{w/u}: Colin Andrew fights target creature. (Activate this ability only if Colin Andrew is attacking.)
If Colin Andrew would die, if he had a -1/-1 counter on him, instead exile him and return him to the battlefield transformed under his owner's control.
"Even when I'm gone I will always be with you."
- Vanessa Kwan