Shalazam

This weapon has a life stealing proc on it. The damage is around 19-20 base. Training dummy resisted 4 so the damage was 15. Heal was for 15. Damage type is curse and the proc name is called "Lichdrain".

They can be bought for 38cc from Foreman Aldeus ( Gathering Skills) in Availia at the well

What's the damage and cooldown?

Got two in about 8 days of farming 4+ hrs a day in the dame bed room over about three weeks span of time