Remembrance + Mortuary + Bloodflow Connoisseur + Ornithopter

Remembrance

Mortuary

Bloodflow Connoisseur

Ornithopter

How it works

1. Activate Bloodflow Connoisseur by sacrificing Ornithopter.
2. When Ornithopter dies, Mortuary and Remembrance trigger.
3. Resolve the Mortuary trigger, putting Ornithopter from your graveyard on top of your library.
4. Resolve the Remembrance trigger, searching your library for Ornithopter and putting it into your hand.
5. Resolve the Bloodflow Connoisseur ability, putting a +1/+1 counter on it.
6. Cast Ornithopter by paying 0.
7. Repeat.