Enchanting a weapon is where you would take a normal weapon and enhance it's statistics.
A normal Blood would be:
Durability - 400000/400000
Damage - S: 150m200 L: 150m200
AC : -1 Hit : 6 Dam : 0
Vita : 0 Mana : 0
Might : 0 Will : 0 Grace : 0
Protection : 0 Healing : 0
Rogue Level 95
Might to Wield : 10
An Enchanted Blood would be:
Durability - 800000/800000
Damage - S: 150m250 L: 150m250
AC : -1 Hit : 6 Dam : 0
Vita : 0 Mana : 5000
Might : 0 Will : 0 Grace : 0
Protection : 0 Healing : 0
Rogue Level 99
Might to Wield : 10
As you see by Enchanting you Blood you get Durability that has doubled and you get
5,000 more mana from the Enchanted Blood.