This is an idea I have been thinking about since I heard the word Catalyzer.

It reminded me of the word Cauterizer.
Which apparently isn't a real word, but it exists and I've heard it before.
But I suppose some of you will know what Cautery is.

Since the release of the new guns, I thought this idea might make for something interesting.

The Cauterizer series, instead of having Normal and Charged attacks, just has one dynamic attack.
The longer you hold down attack, the harder the attack hits, but you can release it any time for varying effects.
Kind of like Focus Attacks in SFIV.

It's 3-star version is called 'Dermabrazer'.
The Dermabrazer would be fairly weak uncharged, a 1 pixel wide line that deals lower than average damage, which looks kind of like the ones energy turrets fire. When charged it fires a wider line that can only penetrate one monster. To fully charge it only takes 2.5 seconds.
Description: Makes monsters look at least 10 years younger! 30 day money-back guarantee!

The 4-star version is called 'Surgical Lazer'.
The Surgical Lazer is much better than the Dermabrazer. The gun now fires a wider uncharged attack, that can hit twice on monsters moving away from it. At half charge (2.5 seconds) it will still penetrate one monster, but the max time is doubled to 5. A full charge can penetrate 2 monsters and damage a 3rd.
Description: The healing is not as rewarding as the hurting.

Obviously, the 5-star version is called 'Cauterizer'.
It's uncharged attack still doesn't penetrate monsters, but now it can hit completely stationary monsters twice as well. The full charge attack can penetrate through an unlimited amount of monsters and during the attack, will hit monsters still inside the beam more than once. It takes about 8 seconds to fully charge the Cauterizer's beam. The charge attack beam itself looks like this, just the center is wider.
Description: Just standing near this lazer while it is being fired is enough to cure poor eyesight. Allegedly.

The lazers this gun fires should have a range long enough to extend off screen. Lazers look weird when they just disappear into thin air.
The gun's charge attack will leave you stationary for the duration. Which on the Cauterizer is about 2~3 seconds.
It can also only fire one shot before reloading.

I had a thought that this gun, considering it is medical in nature, could randomly drop from Red Heart boxes along with the hearts. Since the boxes themselves are meant to contain healing supplies. But otherwise it can just be a crafted item or token reward.

Not too fussed about damage types or amounts, I was more interested in the mechanic of a dynamic charge gun.
I don't think it will be OP if it's done right. And it is kind of like a railgun, just cooler.

Anyway, that's the idea.
You've all read these threads before.