Badge of the Swarmguard

2 different WoW Forever spells share the name Badge of the Swarmguard. Each is a separate effect with its own tooltip; pick the one you mean to compare it with Classic Era.

• Badge of the Swarmguard #26480 unchanged Gives a chance on melee or ranged attack to apply an armor penetration effect on you for 30 sec, lowering the target's physical armor by $26481s1 to your own attacks. The armor penetration effect can be applied up to 6 times.
• Badge of the Swarmguard #1213297 changed Take on the aspect of the Swarmguard, attacking nearby enemies in a whirlwind of blades that lasts 6 sec.