Reaper King | Kozilek, Butcher of Truth | Atla Palani, Nest Tender

(and one other card)

Cause a creature to enter the battlefield under your control by any method.
When that creature enters the battlefield,
Reaper King triggers, destroying that creature.
Resolve
Atla Palani's trigger, revealing cards from the top of your library until you reveal a creature card and putting it onto the battlefield.
Repeat from step 2 until
Kozilek enters the battlefield then dies, or until you choose to end the loop by destroying an opponent's permanent.
If
Kozilek dies, it and
Atla Palani trigger.
Resolve
Kozilek's trigger, shuffling your graveyard into your library.
Continue from step 3.

Infinite death triggers.
Infinite ETB.
Infinite LTB.
Put all creatures from your library onto the battlefield, then they die, then repeat infinitely.