Well, you have the -invite t2 and so forth.
Would it be possible to change -invite red,blue,etc
Reason for this, we made a new rule in regard to duels.
1. No duel blinding (Duel blinding is when you send duels mid-combat, so people can't cast spell or accidently accept duels)
2. Duels must be formally asked over chat to avoid such things by "accident" (Sarcasm, a lot of people say they "accidently" send duels while people are fighting)
Basically change the spell for dueling that it's something you need to type -yes too instead of popping up on the screen blinding you.