Cast Bone Saw by paying {0}.
Bone Saw enters the battlefield as a copy of Cavalier of Dawn.
Copy of Cavalier of Dawn enter-the-battlefield ability triggers, destroying itself and creating you a 3/3 Golem token.
Copy of Cavalier of Dawn dies, triggering itself, returning Bone Saw from your graveyard to your hand.
Repeat.

Infinite creature tokens

Infinite death triggers

Infinite creature ETB

Infinite creature LTB

Infinite storm count

Cavalier of Dawn

Infinite Reflection

March of the Machines

Bone Saw

Tap Barrage Ogre, sacrificing Bone Saw to deal 2 damage to any target.
Tap Emry, targeting Bone Saw.
Cast Bone Saw.
Jeskai Ascendancy triggers, allowing you to loot.
Jeskai Ascendancy triggers, untapping all creatures you control and giving them +1/+1 until end of turn.
Repeat.

Infinite damage

Infinite looting

Infinitely large creatures you control until end of turn

Infinite untap of creatures you control

Infinite mana creatures you control can produce

Emry, Lurker of the Loch

Jeskai Ascendancy

Barrage Ogre

Tap Orcish Vandal, sacrificing Bone Saw to deal 2 damage to any target.
Tap Emry, targeting Bone Saw.
Cast Bone Saw.
Jeskai Ascendancy triggers, allowing you to loot.
Jeskai Ascendancy triggers, untapping all creatures you control and giving them +1/+1 until end of turn.
Repeat.

Orcish Vandal

Tap Orcish Mechanics, sacrificing Bone Saw to deal 2 damage to any target.
Tap Emry, targeting Bone Saw.
Cast Bone Saw.
Jeskai Ascendancy triggers, allowing you to loot.
Jeskai Ascendancy triggers, untapping all creatures you control and giving them +1/+1 until end of turn.
Repeat.

Orcish Mechanics

Tap Embraal Gear-Smasher, sacrificing Bone Saw to deal 2 damage to each opponent.
Tap Emry, targeting Bone Saw.
Cast Bone Saw.
Jeskai Ascendancy triggers, allowing you to loot.
Jeskai Ascendancy triggers, untapping all creatures you control and giving them +1/+1 until end of turn.
Repeat.

Embraal Gear-Smasher

Combos with "Bone Saw"