Fatal Error message when attacking Willow'sShop guardian

[Trola]

I got following error when tried to attack Willow's Shop Guardian:
[code]
Fatal error: Unsupported operand types in /home/magicdue/public_html/core/combat/influences/SkillVampire.php on line 35[/code]

Creature used in ritual:
- Tormented soul II

[Rendril]

Issue should be fixed now.