Forum:Rank-up magic - Barian's Force

Requirements to activate
In the effect of Rank-Up Magic - Barian's Force, it says "... then detach an xyz material from an opponent's monster. It says then which gives the opinion that it is not optional. Does this mean that you can only activate it while your opponent has an xyz monster with an xyz material? (Meklordsa5m (talk • contribs) 14:09, December 29, 2012 (UTC))