Birch Ent Boss with one command block Map

Birch Ent Boss with one command block Map is a Birch Ent (very aggressive) with the ability of 3 mobs: zombie, witch and Skeleton.
Fight the braches and kill them to make the trunk vulnerable, after that finish the trunk to get a very special drop from this boss.
The drop is a special sword that ...
Birch Ent Boss with one command block Map - http://www.8minecraft.com/birch-ent-boss-with-one-command-block-map/