Enchanting a weapon is where you would take a normal weapon and enhance it's statistics.
Blood
Durability: 400000/400000
Damage: S: 150m200 L: 150m200
Vita: 0 Mana: 0
AC: -1
Hit: 6
Rogue Level: 95
Might to Wield: 10
Enchanted Blood
Durability: 800000/800000
Damage: S: 150m200 L: 150m250
AC: -1
Hit: 6
Vita: 0 Mana: 5000
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.