Teshar aka the epic bird rushing to the ground (EDH / Commander)

Main Combo Pieces:
1) Free artifact return from graveyard while leaving the battlefield: Junk Diver, Myr Retriever, Salvager of Ruin, Scrap Trawler and Workshop Assistant
2) Free artifact return from graveyard while entering the battlefield: Trusty Packbeast and Treasure Hunter
3) Artifact Bounce while entering the battlefield: Glint Hawk and Kor Skyfisher
4) Free artifact creatures (or replace mana with death): Memnite, Ornithopter, Shield Sphere, Cathodion and Myr Moonvessel
5) Free artifacts: Mishra's Bauble, Urza's Bauble
6) Win enabler same turn: Aetherflux Reservoir, Altar of the Brood / Win enabler next turn: Desecrated Tomb, Myr Sire
7) Sac Outlet without mana generation: Altar of Dementia, Blasting Station, Fanatical Devotion and Grinding Station
8) Sac Outlet with mana generation: Ashnod's Altar and Krark-Clan Ironworks

There are 5 or more possible infinity combos with this deck. They basically need Teshar and a Sac Outlet on board + a free artifact returner (ltb) and a 0 mana artifact.
You start with either the artifact returner or the 0 mana artifact in the graveyard or both pieces on board / in the hand (in our scenario the 0 mana artifact is in our graveyard).
Step 1) Play your artifact returner (grab something from Teshar).
Step 2) Sac the artifact returner and grab your 0 mana artifact in the graveyard with the ltb.
Step 3) Play your 0 mana artifact and get the artifact returner for free on the battlefield with Teshar.
Step 4) Sac your 0 mana artifact.
Step 5) Start again at Step 2

Keep in mind that the combo differs with the different possible pieces!

You either win milling your opponents (Altar of the Brood, Altar of Dementia, Grinding Station), by pinging them to death with Blasting Station, getting Aetherflux Reservoir going 9000+ times, sacing Perilous Myr over and over with either Ashnod's Altar or Krark-Clan Ironworks, getting infinite tokens with Desecrated Tomb or Myr Sire and many more ways.

Have fun exploring all the possibilities :)