World of Warcraft: Forever · Warrior · Arms talent · tier 7

Mortal Strike

unchanged · 1 rank in Classic Era, 1 rank in the Forever beta. Requires Sweeping Strikes.

Warrior talent calculator · Every Warrior spell and talent change

Classic Era against Forever

Compared at the top rank each game has, since that is what a fully trained talent does.

Mortal Strike at its top rank

Classic Era

A vicious strike that deals weapon damage plus 85 and wounds the target, reducing the effectiveness of any healing by 50% for 10 sec.300 Rage · Instant · 6 sec cooldown · 5 yd · level 40

Forever beta

A vicious strike that deals weapon damage plus 85 and wounds the target, reducing the effectiveness of any healing by 50% for 10 sec.300 Rage · Instant · 6 sec cooldown · 5 yd · level 40

Other Arms talents

Improved Heroic Striketier 1
Deflectiontier 1
Improved Rendtier 1
Improved Chargetier 2
Improved Tactical Masterytier 2
Improved Overpowertier 2
Anger Managementtier 3
Deep Woundstier 3
Spearing Striketier 4
Two-Handed Weapon Specializationtier 4
Impaletier 4
Bloodthrilltier 5
Weaponmastertier 5
Sweeping Strikestier 5
Weaponmastertier 5
Weaponmastertier 5
Weaponmastertier 5
Improved Slamtier 6
Polearm Specializationtier 6
Improved Hamstringtier 6

Source: World of Warcraft: Forever game data (1.60.1.70205) and of the current Classic Era client, matched by talent id. Nothing here comes from a third party.