Forest Hydra

Trample.
During each player's end phase flip a coin. If heads, you may choose and destroy target enchantment (if any), than put poison counters on target player equal to the converted mana cost of that enchantment.
A hydra found in the deep ends of the forest, sleeping forever, awakened by the dwarves war with the elves. It screams only one thing that leaves even the most battle hardened dwarf whimpering like a lost child. "I'm hungry..."