Skullbriar, the Ever-Unliving

You may cast Skullbriar, the Ever-Unliving from
your graveyard, but not from anywhere else.
Haste, trample
{b/g}: Exile target permanent card from a graveyard
and put a +1/+1 counter on Skullbriar.
Sacrifice a permanent: Put Skullbriar into your graveyard from the command zone.