Eloise, Nephalia Sleuth + Ulvenwald Mysteries + Krark-Clan Ironworks + Phyrexian Altar

Eloise, Nephalia Sleuth

Ulvenwald Mysteries

Krark-Clan Ironworks

Phyrexian Altar

How it works

1. Activate Krark-Clan Ironworks by sacrificing a Clue, adding CC.
2. Eloise's and Ulvenwald Mysteries' second abilities trigger.
3. Resolve the Eloise trigger, causing you to surveil 1.
4. Resolve the Ulvenwald Mysteries trigger, creating a 1/1 Human Soldier creature token.
5. Activate Phyrexian Altar by sacrificing the Human Soldier, adding one mana of any color.
6. Eloise's first and second abilities trigger.
7. Resolve Eloise's first trigger, causing you to investigate.
8. Resolve Eloise's second trigger, causing you to surveil 1.
9. Repeat.
10. Once you have infinite mana, you may instead sacrifice the Clues to their own abilities.