Requires

Rod of Absorption must be on the battlefield. Echo Storm must be in hand. Gilded Lotus must be on the battlefield. You've cast your commander from the command zone at least twice. Mana needed:

Steps

1. Activate Gilded Lotus by tapping it, adding .
2. Cast Echo Storm by paying , targeting Rod of Absorption.
3. Echo Storm triggers, copying itself for each time you've cast your commander from the command zone this game, with each copy targeting Gilded Lotus.
4. Resolve all copies of Echo Storm, creating that many token copies of Gilded Lotus.
5. Resolve the original Echo Storm, creating a token copy of Rod of Absorption and exiling Echo Storm due to Rod of Absorption.
6. Activate two Gilded Lotus tokens by tapping them, adding six mana of any color.
7. Activate the original Rod of Absorption by paying , tapping and sacrificing it, causing you to cast Echo Storm from exile without paying its mana cost, targeting the Rod of Absorption token.
8. Repeat from step 3.
9. Once you have infinite mana, you may target any other artifact you control using Echo Storm.

Results