Kilian The Sword Oath

Kilian ETB with {e}{e}{e}.
{t}{w/b}{w/b}{e}: Counter target noncreature spell.
{t}{b}{b}{b}{b}{e}: Destroy target nonland permanent.
{t} Sacrifice this card, then flip a coin, if
heads, regenerate him, if tails, return him to
the battlefield transformed with {e}{e}{e}.