other rules, DONT ASK FOR THE IMPOSSIBLE!
u cant change the size of aka, fata, lao, or shen.
u cant have more that 2 different boss monsters as the targets.
u can have more that 2 different types of monsters in some occasions (like kirin and kusha).
nothing in the base.
no free shit, thats what christmas is for.
those are the basic rules to customs. if i remember any more then ill post em.