Gorion, Wise Mentor + Guile + Sapphire Dragon // Psionic Pulse

Gorion, Wise Mentor

Guile

Sapphire Dragon // Psionic Pulse

How it works

1. Cast Psionic Pulse by paying 2, targeting another noncreature spell currently on the stack.
2. Gorion triggers, copying Psionic Pulse, with the copy targeting the original Psionic Pulse.
3. Resolve the copy of Psionic Pulse, causing you to exile the original Psionic Pulse, and cast it from exile without paying its mana cost, targeting another noncreature spell due to Guile.
4. Repeat from step 2.