Requires

Stormsplitter must be on the battlefield. Invasion of Segovia // Caetus, Sea Tyrant of Segovia must be on the battlefield (as Caetus, Sea Tyrant of Segovia). Reiterate must be in hand. You have another instant or sorcery card in hand with enough additional mana to cast it. Mana needed:

Steps

1. Cast any instant or sorcery by paying its mana cost.
2. Stormsplitter triggers, creating a token copy of Stormsplitter.
3. Cast Reiterate with buyback by paying , tapping two copies of Stormsplitter, and tapping Caetus.
4. Both Stormsplitters triggers, creating two token copies of themselves.
5. Reiterate resolves, copying the spell from step 1 and returning itself to your hand.
6. Cast Reiterate with buyback by paying and tapping two token copies of Stormsplitter.
7. Each Stormsplitter you control triggers, creating four token copies of Stormsplitter.
8. Reiterate resolves, copying the spell from step 1 and returning itself to your hand.
9. Cast Reiterate with buyback by paying and tapping four token copies of Stormsplitter.
10. Each Stormsplitter you control triggers, creating that many token copies of Stormsplitter.
11. Reiterate resolves, copying the spell from step 1 and returning itself to your hand.
12. Cast Reiterate with buyback by tapping six token copies of Stormsplitter.
13. Repeat from step 10.

Results