Wabbajack, the Pooka

Indestructible.
{2}{u}: Untap Wabbajack, the Pooka.
Whenever Wabbajack, the Pooka attacks or blocks, Put a +1/+1 counter on it.
"Many think Wabbajack a myth, others not even that, but your grandpa knew the truth, rest his soul."
-Grandma's fireplace stories