The Hydra's Challenge

Enchant target ceature you control.
Enchanted creature gains +1/+1. Put seven Hydra counters on enchanted creature. Whenever enchanted creature deals damage to your opponent or whenever a creature wounded by enchanted creature is send to the graveyard, remove a Hydra counter from enchanted creature. When the last counter is removed, target player loses 7 life points. If the Hydra's Challenge or the creature it enchants leaves play, return the Hydra's Challenge to owner's hand.