beast stay animation

This is a spell to add on to summon by the book, when one of the beast is about to reach its time limit you can use this spell to add on to is time at that cost of 1 of your hp every time your beast takes damage and your concentration this still has a limit though it can only add a max of 24 hours to your beasts time limit and makes it so your next time you summon that beast they have half there hp and attack if you use the regular rest time but if you wait two day it is summoned with the regular hp and attack. This spell dose not get stronger the higher level the caster is, can only be used once per long rest.