Havi, the All-Father | Sakashima the Impostor | Carrion Feeder

Cards

Activate
Carrion Feeder by sacrificing
Sakashima the Impostor.
When
Sakashima the Impostor dies, it and
Havi trigger.
Resolve the
Havi trigger, returning
Sakashima the Impostor from your graveyard to the battlefield as a copy of
Havi.
Resolve the
Sakashima the Impostor trigger, returning any legendary creature card with mana value 5 or less from your graveyard to the battlefield.
Resolve the
Carrion Feeder ability, putting a +1/+1 counter on it.
Repeat.

Infinite LTB.
Infinite ETB.
Infinite sacrifice triggers.
Infinite death triggers.
Infinite +1/+1 counters on
Carrion Feeder.
Put all legendary creature cards with mana value 5 or less from your graveyard onto the battlefield.