Caed Dhu

({t}: Add {g}.)
As Murmuring Boskenters the
battlefield, you may reveal a Treefolk card
from your hand. If you don't, Murmuring
Bosk enters the battlefield tapped.
{t}: Add {w} or {b}. Murmuring Boskenters deals 1
damage to you.
(From Elder Speech meaning Black Forest
or Black Grove)