Swords Decay

Crates 3 swords of made of blood, guts, claws and eyes. They act on the turn fallowing yours or before your turn. they can all move on their own 30 ft but only one cat attack using the casters spell attack modifier dealing 2d8+ CHA modifier necrotic damage. However the caster can use a bonus action to launch one of the swords, if the attack hits then they take 6d6 necrotic damage must make a constitution saving throw or become Poisoned. If someone is killed by this spell the caster gets a charge of rotness, they can hold this charge for 1 year and during that time whenever you make an attack roll you can use it and deal one instance of 10 necrotic damage. the swords can never move more then 100 feet from you.