Answer:
I am the signature stroll of ducks and penguins
I'm written with two letters, said with one and seen with two. What am I?
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
My voice is tender, my waist is slender and I'm often invited to play. Yet wherever I go, I must take my bow or else I have nothing to say. What am I?
What gets sharper the more you use it?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?