Fun mill

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead. If an effect would put one or more counters on a permanent you control, it puts twice that many of those counters on that permanent instead.

Enchant creature At the beginning of your upkeep, create a token that's a copy of enchanted creature.

Whenever this creature or another Ally you control enters, target player mills X cards, where X is the number of Allies you control.