Scrap Mastery + Codex Shredder + Krark-Clan Ironworks

Scrap Mastery

Codex Shredder

Krark-Clan Ironworks

How it works

1. Activate any number of mana-producing artifacts you control by tapping them, adding at least .
2. Activate Krark-Clan Ironworks by sacrificing any artifact except itself, adding CC.
3. Repeat step 2 for each remaining applicable artifact.
4. Activate Krark-Clan Ironworks by sacrificing itself, adding CC.
5. Cast Scrap Mastery by paying 3, causing each player to exile all artifact cards from your graveyard, then sacrifice all artifacts they control, then return all exiled cards from exile to the battlefield.
6. Repeat steps 1-4 one additional time.
7. Activate Codex Shredder's second ability by paying 5, tapping and sacrificing it, returning Scrap Mastery from your graveyard to your hand.
8. Repeat from step 5.
9. If artifacts you control can tap to produce at least 1, this combo nets infinite mana of those types.
10. If you control four or more other nontoken artifacts as this combo begins, this combo nets infinite colorless mana.

This clever loop revolves around recycling your entire artifact setup through a massive graveyard-swapping spell while using the sacrificial engine of Krark-Clan Ironworks to generate the initial mana and fodder. By sacrificing your board to Krark-Clan Ironworks, you load your graveyard with artifacts just in time for Scrap Mastery to sweep them all back onto the battlefield, simultaneously creating a fresh batch of sacrifice targets and resetting your resources. Meanwhile, Codex Shredder sits quietly on the board until its ultimate recursion ability can be activated to scoop Scrap Mastery right back out of the graveyard and into your hand, allowing you to pay the casting cost and repeat the entire cycle indefinitely.