Thornbite Staff + Fire Whip + Basilisk Collar

Thornbite Staff
Fire Whip
Basilisk Collar

All permanents on the battlefield. All permanents attached to the same creature. The creature does not have summoning sickness.
  1. Activate the creature by tapping it, dealing 1 damage to any opponent's creature and causing you to gain 1 life
  2. The opponent's creature dies due to deathtouch, triggering Thornbite Staff, untapping your creature
  3. Repeat
Near-infinite lifegain. Near-infinite lifegain triggers. Destroy all creatures you do not control. Destroy any creature you do not control at instant speed.