Leaf Juggernaut, Forest Horror

At the beginning of each upkeep, you may pay {g} to add a Forest counter on Leaf Juggernaut, Horror Tree.
This creature has +0/+2 for each Forest counter on it and Deathtouch.
When this creature dies, you may pay {2}{b}to deal X damage to each creature and each player, where X is the amount of Tree Counters on Leaf Juggernaut, Tree Horror.