May be a silly question or just erroneous text on the item description: does it really leech back HP? (5% chance of restoring 4% of damage as HP when performing a physical attack).
I've never had a leeching HP gear so I'm not sure how it would show up if it did fire (green heal number over head?), but after 30 minutes of killing kobolds with just attacks and also counter slash/pulse strike, I did not see any evidence of extra healing from the item..