Totem of undying-ish skript (can anyone make it for me?)

[NiCoMaCz]

basically its a prismarine shard
that if in offhand, it acts like a totem of undying and gets removed and then it revives you with all of your items and also (idk you can add a special animation)
but this will be only 20% chance of actually saving your life
if it wont happen then youll just die and your totem will be removed
but to increase this chance if you stack more prismarine shards the higher the chance will go up