Rod of Absorption + Echo Storm + Dreamstone Hedron

Rod of Absorption

Echo Storm

Dreamstone Hedron

How it works

1. Activate Dreamstone Hedron's first ability by tapping it, adding CCC.
2. Cast Echo Storm by paying 3, 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 Dreamstone Hedron.
4. Resolve all copies of Echo Storm, creating that many token copies of Dreamstone Hedron.
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 Dreamstone Hedron tokens' first abilities by tapping them, adding six C.
7. Activate the original Rod of Absorption by paying 5, 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, or sacrifice the Dreamstone Hedron tokens to draw infinite cards.

This looping engine turns a single cast of Echo Storm into an escalating cascade of artifact replication, fueled by the mana-producing power of Dreamstone Hedron and its countless token copies. As you repeatedly copy Echo Storm, one of those copies targets the original Rod of Absorption, which cleverly intercepts and exiles the spell as it resolves rather than letting it hit the graveyard. You can then crack the original Rod of Absorption, using the mana generated by tapping your burgeoning field of Dreamstone Hedron tokens to recast Echo Storm for free from exile and restart the whole cycle. Once your mana and artifact copies grow unboundedly large, you can freely pivot that infinite loop into endless card draw by sacrificing your extra Dreamstone Hedron tokens.