ok, when you use astericks, use "iswm", I haven't tested this script, but, i think it should work.
*note: not good with on ban at all, lol

Code:
Code:
on *:BAN:#avatarrp: {
  if (*Krystal* iswm $bnick) { mode $chan -b $banmask }
  if (*Crystal* iswm $bnick) { mode $chan -b $banmask }
}

Hope this works.

-Kurdish_Assass1n