Village Bell-Ringer + Splinter Twin

Village Bell-Ringer
Splinter Twin

Requires
All permanents on the battlefield. Splinter Twin attached to Village Bell-Ringer. Village Bell-Ringer does not have summoning sickness.
Steps
  1. Activate Village Bell-Ringer by tapping it, creating a token copy of itself with haste
  2. The Village Bell-Ringer token enters the battlefield, untapping all creatures
  3. Repeat
Results
Infinite creature tokens with haste. Infinite ETB. Infinite untap of creatures you control.