Ball of Blood

You control your blood and compact it into a ball dealing 4d8 necrotic damage. Stage 1 you take 1d4 damage and get a +1 to hit and damage/Stage 2 you take 1d6 damage and get a +2 to hit and damage/Stage3 you take 1d8 damage and you get a +3 to hit and damage/Stage 4 you take 1d10 damage and get +5 to hit and damage/Stage 5 you take 1d20 damage and you get advantage on hit and a extra 1d10 on damage