Dual Strike, and Twincast

Prerequisites

• Dual Strike in hand or in exile
• Twincast in hand
• You have a way to cast an additional instant or sorcery, or an opponent is casting one
• , plus an additional if Dual Strike was not foretold, plus enough mana to cast the additional spell if needed available

Steps

1. Cast any other instant and/or sorcery spell, or wait for an opponent to cast one
2. Holding priority, cast Dual Strike by paying , copying the next instant or sorcery spell you cast with mana value four or less
3. Cast Twincast by paying , targeting the instant or sorcery spell cast in step 1
4. Dual Strike triggers, copying Twincast, with the copy targeting the original Twincast
5. Resolve the copy of Twincast, copying Twincast, with the copy targeting the original Twincast
6. Repeat step 5

Results

• Infinite magecraft triggers