Forum:Misplay rule of thumb

I have been running into a lot of misplays recently, most of which are by different people (or me when I forget that Rai-oh stops adding cards). What is the general rule of thumb for both In a Tournament, and In a Casual duel?

I just want to know how it is generally treated so as to has a singular rule to apply to my play group.

Shinkirou 15:11, March 31, 2012 (UTC)