Pandemoniac Gate

Whenever a creature enters the battlefield, Pandemoniac Gate deals 2 damage to that creature.
When Pandemoniac Gate leaves the battlefield, create a 1/1 black and red Demon token with "This creature gets +1/+1 for each creature that has died since your last upkeep."
{t} Sacrifice Pandemoniac Gate: Pandemoniac Gate deals 2 damage to each creature.