Magic Forums

hallo, i want to ask you something may i know why all spells that i cast not effect to other person but to few person it effect why? what is necessary/something that need to cast these spell?i use some spells like:death spell,karma spell, revenge spell,another death spell,dark death spell,anger revenge spell kill an enemy spell,curse of destruction spell,death by fire, curse of illness,dark one curse but that spell are not effect to many person?please tell me if i did something wrong thanks