The Stalker

The Stalker is a radiant weapon that is dropped by the Brain of Cthulhu. It swings out a gruesome mace in an inaccurate fashion, which can extend up to 12 tiles before returning and damages and pierces enemies. The first successful strike in an attack releases a lingering energy particle that heals players it touches equal to the attacking player's bonus healing. Up to three healing energy can exist at a time, and it disappears after 10 seconds.