Basri's Lieutenant + Cathars' Crusade + Carrion Feeder

Basri's Lieutenant
Cathars' Crusade
Carrion Feeder

Requires
All permanents on the battlefield. You control at least one additional creature with at least one +1/+1 counter.
Steps
  1. Activate Carrion Feeder by sacrificing a creature with at least one +1/+1 counter, Carrion Feeder gets +1/+1 until end of turn
  2. Basri's Lieutenant trigger, creating a 2/2 Knight token
  3. When Knight token enters the battlefield, Cathars' Crusade triggers, putting a +1/+1 counter on each creature you control
  4. Resolve the Goblin Bombardment ability by dealing 1 damage to any target
  5. Repeat
Results
Infinite ETB. Infinite LTB. Infinite death triggers. Infinite sacrifice triggers. Infinite +1/+1 counters.