Arcane Leech

Epic Tier
Prerequisite: 21st level, arcane defiling power
Benefit: When you use an arcane daily attack power with your arcane defiling, each target you hit with the attack cannot regain hit points until the end of your next turn. If you hit at least one target with the attack, you also regain hit points equal to half your healing surge value.

Published in Dark Sun Campaign Setting, page(s) 115.