Primal Amulet // Primal Wellspring + Frantic Search + Narset's Reversal

Prerequisites

You control two additional lands that can tap to produce at least {1}{U}.

Steps

1. Activate Primal Wellspring and the two additional lands by tapping them, adding {1}{U}{U} and creating a delayed triggered ability.
2. Cast Frantic Search by paying {2}{U}.
3. Primal Wellspring's ability triggers, copying Frantic Search.
4. Resolve the copy of Frantic Search, looting twice and untapping Primal Wellspring and the two other lands.
5. Activate Primal Wellspring and those two lands, adding at least {1}{U}{U} and creating another delayed triggered ability.
6. Cast Narset's Reversal by paying {U}{U}, targeting Frantic Search.
7. Primal Wellspring's ability triggers, creating a copy of Narset's Reversal targeting the original Narset's Reversal.
8. Resolve the copy of Narset's Reversal, copying the original Narset's Reversal and returning the original Narset's Reversal to your hand.
9. Resolve the new copy of Narset's Reversal, creating a copy of Frantic Search and returning the original Frantic Search to your hand.
10. Resolve the copy of Frantic Search, looting twice and untapping Primal Wellspring and two other lands.
11. Repeat.