Homebrew: Monster Hunter's Switch Axe

[shadram]

Hi,
I wanted to give my party a powerful and unique weapon, and since I've been playing Monster Hunter World again recently, I thought I'd have a go at creating a switch axe. I realise it's a little complex, but, y'know, high level Pathfinder... Comments and criticism welcome. The main thing I'm unsure about is the extra damage on the 2 action activation - is it too much?

Switch Axe Item 14
Unique, Magical, Transmutation
Price 3000gp
Usage held in 2 hands; Bulk 2
Created by a legendary dwarven smith, this +2 greater striking great axe was created to slay dragons and great worms, the largest foes of dwarvenkind. A series of ten gems along its hilt store charges and light up with each swing of the axe, allowing it to transform and deal mighty blows to the wielder's enemies. All charges are lost if no successful strike is made for 10 minutes.

Activate (free action) Trigger You strike a creature with the switch axe while it is in axe form; Effect The switch axe gains 1 charge, up to a maximum of 10 charges.

Activate (one action) command; Requirement The switch axe has at least 5 charges; Effect The switch axe transforms into a +2 greater striking great sword which deals an additional 1d6 force damage on a successful strike. Performing a strike action with the switch axe while in sword form spends 1 charge. If the switch axe has zero charges remaining, it immediately transforms back into its axe form as a free action.

Activate (one action) command; Requirement The switch axe is in sword form; Effect The switch axe transforms back into its axe form.

Activate (2 actions) Requirement The switch axe is in sword form and has at least 5 charges; Effect Perform a strike with the switch axe. On a successful hit, the target takes an additional 8d6 force damage, increasing to 16d6 force damage on a critical hit. The switch axe loses all remaining charges and immediately transforms back into its axe form.

[voideternal]

Probably not too much. It doesn't seem stronger than a level 10, 3-action one-inch punch with a 1d10 unarmed strike.

Edit nevermind, the one-inch punch does average 22 vs the 28 of the switch axe, so I guess the switch axe is stronger. That said, it doesn't seem too much different especially at level 14.

[shadram]

Awesome, thanks!
I figured since this could only be triggered once every 3 rounds at most, more likely once every 4-5 rounds, having it be a little overpowered wouldn't be much of a problem. Nice to have something to compare it to, though!