Kithandurn, the awaiting one

Changeling, Imitate, Ward {2}.
If this creature is in your graveyard when a
creature with Changeling enters the battlefield
You may exile that creature and return this one
to the battlefield.
{8}{g}{g}, Exile this creature: Create an 8/8 green
Shapeshifter creature token with "This spell can't
be countered," Indestructible, Trample,
and Changeling.