You May Not Play More Than Three Creatures From This Point

Whenever an opponent casts a creature spell, this enchantment deals 1 damage to that player.

Each other non-Aura enchantment is a creature in addition to its other types and has base power and base toughness each equal to its mana value.

Enchant creature Enchanted creature has poisonous 3. (Whenever it deals combat damage to a player, that player gets three poison counters. A player with ten or more poison counters loses the game.)