Vial of Dragon Blood
From The Heroes of Might and Magic III wiki
|Vial of Dragon Blood|
|Effect: All dragons under hero's command receive +5 to their attack and +5 to defense.|
|You find a cave guarded by an ancient dragon. After a fierce battle, you slay him. Dragon blood supposedly has magical properties, so you carefully gather some in a vial.|
Vial of Dragon Blood is a relic class artifact, that is equipped in misc slot.
You cannot purchase relic artifacts in Artifact Merchants.