An onion is basically one; so is the glass pear that lights up bright ideas.

Shows you how heavy a package will be. Climbing a mountain or swimming the sea. Altering maps for the distance you see. Lined up in music, a vocal degree. Each dragon and serpent, covered in me. Still no idea? Full acrostic, the alt key.

Ocean rats with wings screaming mine mine mine, killing them should be fine fine fine.

Drop from the clouds in a twisting grey cone, Roars like a train with a deafening tone. Spins round and round as it dances on the ground, And throws heavy objects all over the town

I branch like a mini tree upon a noble head, Lost each winter, then grown back instead. Velvet coats me while I’m young and new, Hardened into crown before the autumn dew.