Errant, Street Artist + Reality Spasm + Increasing Vengeance

Errant, Street Artist

Reality Spasm

Increasing Vengeance

How it works

1. Cast Reality Spasm by paying at least 3, targeting at least three permanents and choosing the untap mode.
2. Holding priority, cast Increasing Vengeance by paying its mana cost, copying Reality Spasm, targeting at least three permanents.
3. Holding priority, activate at least two mana-producing permanents you control by tapping them, adding at least 1.
4. Activate Errant by paying 1 and tapping it, copying the Reality Spasm copy, targeting Errant and at least two mana-producing permanents you control.
5. Resolve the copy of Reality Spasm from step 3, untapping Errant and at least two mana-producing permanents you control.
6. Repeat from step 3.

This clever loop turns Reality Spasm into an engine for infinite mana by repeatedly untapping your own lands or mana sources. The real beauty of the setup lies in how it bootstraps itself: you use Increasing Vengeance to kickstart the copying chain, but once Errant, Street Artist enters the fray, her activated ability can continuously target and copy those spells without ever needing to cast them from your hand again. Because Errant specifically copies spells that weren't cast, she can target the copies generated by Reality Spasm itself, creating a self-sustaining loop as long as you have enough permanents to tap and untap.