Crazed Glade-Sentinel

{b}, Discard a card: Put a +1/+1 counter on Crazed Tree-Sentinel, it gains hexproof until
end of turn.
Exile target land from a graveyard: Add {b}. You may only activate this ability once each turn.
It's growing, and seeping with each day. The canopy-menders harm the leaves, and the watchers are no longer silent defenders. They are twisting the woods with a fury and malicious intent.