Forum:Underground Arachnid

So, I'm playing against my brother and he plays Underground Arachnid then activates his effect. A few turns pass by and I get something out that can beat it, except he has a monster equipped to it. Another few turns go by and when my turn comes again, I draw Mystical Space Typhoon. I use it to get rid of the equipped thing then attack, but he goes and uses Underground Arachnid's effect. My question is, can he do that? Can the effect of Underground Arachnid be activated on my turn? His argument is that he can because it only says "once per turn" and does not specify whose turn it has to be. At least, that's the basics of it. He said more but I can't really remember it.--Kirin L. (talk • contribs) 23:30, March 18, 2013 (UTC)