Mark of the Coven
Leeches up to +25 health and converts it to energy from nearby monsters up to 1500 health (The effect is stronger the closer you are to the target)
A moderately powered amulet imbued with dark magic.
This mystical trinket siphons life from nearby enemies, transferring their vitality to the wearer.
However, its power wanes over time, leaving its owner vulnerable when the magic fades.