Archaeomancer + Battle Hymn + Cackling Counterpart + Chromatic Orrery + Panharmonicon

Archaeomancer

Battle Hymn

Cackling Counterpart

Chromatic Orrery

Panharmonicon

How it works

1. Activate Chromatic Orrery's first ability by tapping it, adding 5.
2. Cast Battle Hymn by paying 2, adding 1 for each creature you control.
3. Cast Cackling Counterpart by paying 3, creating a token copy of Archaeomancer.
4. The Archaeomancer token enters the battlefield, triggering its ability twice, returning Battle Hymn and Cackling Counterpart from your graveyard to your hand.
5. Repeat from step 2.
6. Once you have infinite mana, you may return any other instant and/or sorcery cards in your graveyard in place of Battle Hymn.

This loop relies on Panharmonicon doubling the entrance trigger of the Archaeomancer token created by Cackling Counterpart, ensuring you always return both your casting spell and your copying spell back to your hand. Meanwhile, Battle Hymn fuels the cycle by generating an expanding pool of red mana based on your growing army of tokens, which Chromatic Orrery then filters into any color you need. By continuously looping these pieces together, you generate infinite mana, tokens, and spell casts to overwhelm the table.