Errant, Street Artist + Reality Spasm + Invasion of Arcavios // Invocation of the Founders

Errant, Street Artist

Reality Spasm

Invasion of Arcavios // Invocation of the Founders

How it works

1. Cast Reality Spasm by paying at least 3, targeting at least three permanents and choosing the untap mode.
2. Invasion of Arcavios // Invocation of the Founders triggers, 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 harnesses Invasion of Arcavios // Invocation of the Founders to duplicate your spells right from the stack, doubling up on every step. By casting Reality Spasm with X set high enough, you create the fuel needed to untap your board repeatedly. Errant, Street Artist acts as the engine's repeating valve, letting you copy and recycle that exact spell using the mana you just generated.