Harbinge of Autumn

{t}, put a charge counter on Harbinger of Autumn: Harbinger of Autumn deals 2 damage to target creature or player.
At the beginning of your upkeep, if Harbinger of Fall has 3 or more charge counters on it, sacrifice it, then deal 2 damage to target creature or player and tap target creature. It doesn't untap during it's controllers next untap step.