You control an indestructible noncreature permanent.
({3} magic symbol) ({G} magic symbol) available.
Steps
Cast Chain of Acid by paying ({3} magic symbol) ({G} magic symbol) , targeting any indestructible noncreature permanent you control.
Deekah triggers, creating a 0/0 Fractal creature token with four +1/+1 counters on it.
Resolve Chain of Acid, failing to destroy the indestructible permanent and choosing to copy Chain of Acid, targeting the indestructible permanent with the copy.