Requires

Gorion, Wise Mentor must be on the battlefield. Spark Double must be on the battlefield (as a copy of Gorion). Virtue of Knowledge // Vantress Visions must be in hand. Mana needed:

Steps

1. Put an activated or triggered ability on the stack under your control.
2. Holding priority, cast Vantress Visions by paying , targeting the ability.
3. Gorion and Spark Double trigger.
4. Resolve the Spark Double trigger, copying Vantress Visions, with the copy targeting Gorion's trigger.
5. Resolve the copy of Vantress Visions, copying Gorion's trigger.
6. Resolve the copy of Gorion's trigger, copying Vantress Visions, with the copy targeting Gorion's trigger.
7. Repeat from step 5.

Results