Requires

Dual Strike must be in hand, or in exile. Increasing Vengeance must be in hand, or in the graveyard. You have an additional instant and/or sorcery card in hand. Mana needed: , plus an additional if Dual Strike was not foretold, plus enough mana to cast the additional instant or sorcery

Steps

1. Cast any other instant and/or sorcery spell by paying its mana cost.
2. Holding priority, cast Dual Strike by paying , copying the next instant or sorcery spell you cast with mana value 4 or less.
3. Cast Increasing Vengeance by paying , targeting the instant or sorcery spell cast in step 1.
4. Dual Strike triggers, copying Increasing Vengeance, with the copy targeting the original Increasing Vengeance.
5. Resolve the copy of Increasing Vengeance, copying Increasing Vengeance, with the copy targeting the original Increasing Vengeance.
6. Repeat step 5.

Results