Forevercraft

Minor Mana Oil

Common, Other, item level 30, item 20745

Changed from Classic: the tooltip differs on the highlighted lines below.
Minor Mana Oil
Other
Requires Level 20
Use: While applied to target weapon it restores 5 mana to the caster every 5 seconds and increases healing done by up to 10. Lasts for 30 minutes.
Sell Price: 10s

Changed from Classic (see below).

Classic's version
Trade Goods
Requires Level 20
Use: While applied to target weapon it restores 4 mana to the caster every 5 seconds. Lasts for 30 minutes.
Sell Price: 10s