Pili-Pala + Dual Casting + Rousing Refrain

Pili-Pala

Dual Casting

Rousing Refrain

How it works

1. If Rousing Refrain is in your hand, cast it by paying its mana cost. Otherwise, at the beginning of your upkeep, its suspend ability will trigger, removing the final time counter from it and casting it from exile without paying its mana cost.
2. Holding priority, activate Pili-Pala by paying and tapping it, copying Rousing Refrain.
3. Resolve the copy of Rousing Refrain, adding at least
4. Activate Pili-Pala by paying 2 and untapping it, adding one mana of any color.
5. Repeat from step 2.