Adaptive Training Post + Reiterate

Prerequisites

You have an instant or sorcery card in hand with enough mana to cast it. You have enough mana to cast Reiterate

Steps

1. Cast the additional instant or sorcery by paying its mana cost.
2. If Adaptive Training Post had two charge counters on it, it triggers, putting a charge counter on it.
3. Holding priority, activate Adaptive Training Post by removing three charge counters from it, copying the next instant or sorcery spell you cast this turn.
4. Cast Reiterate by paying its mana cost, targeting the spell cast in step 1.
5. Adaptive Training Post triggers, copying Reiterate, with the copy targeting the original Reiterate.
6. Resolve the copy of Reiterate, copying the original Reiterate, with the copy targeting the original Reiterate.
7. Repeat step 5.