D3RP?

Derpy flies across the field

Flapping wings in the breeze

She may not look it with her eyes

but she is the hero of our world

Her big wall eyes set her apart

from the competition

With a wave of her muffin wand

She'll clobber those baddies

Mailmare and magical girl

Derpy Hooves is her name

She'll never let those bad guys

Succeed at ending her game

Mailmare and magical girl

Derpy Hooves is her name

Even if you try

You'll never end her game!