Cup of Iniquity

Wondrous Item, Artifact (requires attunement)

“Holding in her hand a golden cup of abominations.”
-Revelation 17:4

The cup of iniquity is an ornate golden chalice, born from the avarice of human corruption and lack of faith. During the middle ages, many knights set out on quests for the “Holy Grail,” which they believed to be a relic of great magical power. In truth, there were four, simple, clay drinking vessels used during the “Last Supper,” but the greedy adventurers who sought the Holy Grail only cup of iniquity gift of the spirit for its magic believed it to be a singular, beautiful, golden chalice. The magic of their combined greed and ambition manifested an object of their heart’s desire: the cup of iniquity.

Attunement. If a good-aligned creature attunes to the Cup of Iniquity, it magically transforms into the Cup of Blessing.

Properties of the Cup. Each time a person of faith is murdered for their beliefs, the Cup of Iniquity magically fills with a little more blood. As an action, you can expend a spell slot and spill blood from the cup into unoccupied spaces within 10 feet. The blood transforms into a number of Bloodfiends equal to the levels of the spell slot expended. A Bloodfiend Fury costs 1 level, a Bloodfiend Berserker costs 3 levels, and a Bloodfiend Onslaught costs 6 levels. The Bloodfiends follow your mental commands during the first round in which they are created. After that, you have no control over their actions, and they indiscriminately attack the creature nearest to them. The Bloodfiends remain for 1 hour or until reduced to 0 hit points.

Destroying the Cup. The cup is a tiny object with an AC of 15 and 1 hit point. It is immune to damage from any source other than the sword of the spirit (AGttB).

Azrael's Guide to the Apocalypse, printed page 170.