Answer:
Curtail me thrice I am a youth; behead me once a snake; complete I'm often used in truth when certain steps you'd take.
I wear a red robe with staff in hand and a stone in my throat.
I am asleep when you are awake I am awake when you fall asleep. I can fly but no feathers to aid my flight.
I'm white and used for cutting and grinding. When I'm damaged, humans usually remove or fill me. For most animals I am a useful tool. What am I?
What is harder to catch the faster you run?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?