Activate Urza by paying 6, creating a token copies of Magic Pot that is a 1/1 Soldiers and a Food token
Activate Krark-Clan Ironworks twice by sacrificing the Magic Pot and Food, adding CCCC.
When the Magic Pot token dies, it triggers, creating a Treasure and a Food token.
Activate Krark-Clan Ironworks by sacrificing the Food or Treasure, adding CC.
Repeat.
This engine relies on Urza, Prince of Kroog to forge a 1/1 soldier copy of Magic Pot for six mana, setting off a cascade of artifact generation amplified by Peregrin Took's replacement effect. Once the copies are in play, Krark-Clan Ironworks acts as the ultimate recycling engine, sacrificing the newly created tokens for colorless mana to fund the next loop. Because Magic Pot triggers upon its death to generate even more resources, you net a surplus of mana and tokens with every iteration, ultimately feeding your infinite sacrifices into Peregrin Took's final ability to draw your entire deck.