Apprentice ring of necromancy

Given to you after your completion of the Necromancy apprenticeship, to start your journey into necromancy. Decide how many bodies you'd like to ressurect, 1 body = 10 charges, then roll 1d20 die per 20 bodies, that will contribute to your success rate. Once all of your bodies are either resurrected or failed to resurrect at all, roll another 1d20 to dictate how powerful your army will be, the more powerful they are tho the shorter there duration and the weeker, the longer.

Notes: Resistance: Necrotic, Vulnerability: Fire, Frightened, Evil Character - School of Necromancy