Chain of Acid, and Dragonsguard Elite

Prerequisites

• Chain of Acid in hand
• Dragonsguard Elite on the battlefield
• You control an indestructible noncreature permanent
• available

Steps

1. Cast Chain of Acid by paying , targeting an indestructible noncreature permanent you control
2. Dragonsguard Elite triggers, putting a +1/+1 counter on it
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

• Infinite +1/+1 counters on Dragonsguard Elite
• Infinite magecraft triggers