[imported_Slaethin]

I had my first taste of the PVP here. I might add it is not similar to that of sphere 51a. However, I think I can deal with the mana potions but can someone tell me how I go about reading power words. Like what are some quick judgements in duel that needs to be made to know if the opponent is casting a real spell or is just simply spamming a power word. Does the indent rule still apply here? If it does I still don't think that it is an efficient way of knowing.
So yeah any help or info on how to differentiate between power word and a real spell would be greatly appreciated.