Rune Mastery
Consuming a Rune has a chance to increase your Strength by 3% for 8 sec.
Tree position
In the Blood Death Knight talent tree, Rune Mastery sits in the Death Knight class talents, row 9 of 10. It takes 2 points to fill. Its row opens once 23 points are spent in Class Talents.
Connected above
The tree draws a line into Rune Mastery from Insidious Chill and Osmosis.

OsmosisAnti-Magic Shell increases healing received by 15%.
Connected below
Rune Mastery leads on to Null Magic and Unyielding Will.
Null MagicMagic damage taken is reduced by 8% and the duration of harmful Magic effects against you are reduced by 35%.
Unyielding WillAnti-Magic Shell now removes all harmful magical effects when activated, but its cooldown is increased by 20 sec.
Same row
Also on this row: Subduing Grasp and Will of the Necropolis.
Subduing GraspWhen you would pull an enemy, the damage they deal to you is reduced by 6% for 6 sec.

Talent trees
Rune Mastery is in the talent tree of 3 specializations. Death Knight: Blood (Tank), Frost (DPS), Unholy (DPS).
Rune Mastery Changes by patch
Tracked changes to this talent between game data builds, newest first.
- First tracked in the game data (patch 12.1.0)