Expansion // Explosion + Prismari, the Inspiration

Mana needed: {U/R}{U/R}

UR identity

Commander legal

The 2 combo pieces

• Expansion // Explosion
• Prismari, the Inspiration

What must be in place

You have another instant or sorcery card in hand with the mana to cast it and applicable target(s) if needed.

How to execute it

1. Cast any other instant or sorcery by paying its mana cost.
2. Holding priority, cast Expansion by paying its mana cost, targeting the instant or sorcery cast in step 1.
3. Expansion's storm ability triggers, creating at least one copy of Expansion targeting the original Expansion
4. Resolve a copy of Expansion, copying Expansion targeting the original Expansion
5. Repeat step 4.

What the combo produces

• Infinite magecraft triggers