Chain of Acid, and Veyran, Voice of Duality

Prerequisites

• Chain of Acid in hand
• Veyran, Voice of Duality on the battlefield
• undefined available

Steps

1. Cast Chain of Acid by paying , targeting an indestructible noncreature permanent you control
2. Veyran triggers twice, giving itself +2/+2 until end of turn
3. Resolve Chain of Acid, destroying nothing and causing you to copy Chain of Acid, targeting an indestructible noncreature permanent you control
4. Repeat from step 2

Results

• Infinitely large Veyran until end of turn
• Infinite magecraft triggers