Remove my first for a building's protrusion, remove my second too, and I'm not much different Remove my first and add an R for what keeps tallies Unchanged, I'm an oath

Beautiful curls, an aerial maneuver, a handy tool at the bar. A roller-coaster feature, a twisting path, a punch in a impromptu spar.

We come in pairs, though not born, one for each, but we’re adorned. Hanging lightly, side by side, a little sparkle, dangling with pride.

I shimmer beyond your night-lit skies A chained princess where starlight lies Not a goddess yet named the same A spiral sea of cosmic flame. What am I?

A block in the back, A sealer of a snack, Or something that holds ammo for an attack.