Sonic Rainboom

Rainbow Dash's signature ability.

-3
Rainbow Dash can only produce a Sonic Rainboom when being extraordinarily loyal

-4
When Pinkie Pie was a filly on the rock farm, she imagined a Sonic Rainboom filling the sky, and what kind of magical world it could come from. This imaginary world of hers is Equestria as we know it.

-3
A Sonic Rainboom is impossible to perform for anypony other than Rainbow Dash.

-12
A Sonic Rainboom is made when Rainbow Dash breaks the rainboom barrier, not the sound barrier.

19
Breaking the sound barrier isn't enough to do a Sonic Rainboom. It has something to do with Pegasi Magic.

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