Vee's Slower Spell Decay

this is a support spell that is used on other spells. In order to cast this spell, you must give up 1/4 of your own hp. when another spells time limit runs out, this spell takes effect by slowing down the spells decay (but not fully) for about 5 minutes. for every level higher than 1, the spell increases by 1 minute. if used on spell level 9 3 times on the same spell, it becomes permanent can cant be dispelled.