Averan, Eternal Knight

When Averan, Eternal Knight enters the battlefield, you may exile target nonwhite creature. If you do, put two -1/-1 counters on Averan.
{2}{w}{w},{t}: Remove a -1/-1 counter from Averan, Eternal Knight.
{w}{w}{w}: Put Averan, Eternal Knight on the battlefield from the command zone tapped.
And it came to pass that the Eternal Knight smote the oncoming evil, preserving the light of Innistrad.