Lets cut the ham and tickle a bear, I'm throwing a splitter of ideas
1-Mind Controlling Lichen
Does what the name says, mind controls a defeated knight to do their bidding, the mind controlled knight has double its max health and uses what weapon it was holding, it also shares the same defenses ad the armor the knight is wearing.
The catches
Only found when in parties of 3 or more
Usually 1-2 per level (depends on size of party)
Only found in T2 and above
Has very little health itself
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2- Gremlin Guardian Mecha
Goliath Online The state of the art portable war machine, tank, and mining vessel for the gremlins, its main attacks are:
Using a very large rocket hammer
Shooting Missiles/Bombs
Shooting bullets from Gun Puppy Chest
It also has a chance of dropping a Gremlin Demo/Mortafire/Thwacker on death
Variants:
Gremlin Guardian Mecha MK Zeus (Shock)
MK Hades (Fire)
MK Odin (Ice)
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3- Project "Big Hoss"
Sorry, I have absolutely zero ideas of what to call this, But this is a much bigger type of the Mecha for the idea above, Its bigger, faster, and stronger too, so if you have to, you need lot mor gun said the russian guy.
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I had 2 more but they were already suggested and I was too lazy to draw them, Yes I did the power of: CONCEPT ART
Here are teh arts for you enjoy, and yes, them quotes are necessary for the idea itself
ART FOR BOTH Lichen AND Gremlin Mech: http://i.imgur.com/LAfCV.png
ART FOR BIG HOSS: http://i.imgur.com/7Fp3u.png
I like the idea of the gremlin mech, as they should be using them already.
Maybe instead of the gun puppy turret being at the stomech move it to the left hand. A weak point could be placed there like have it if you cause it to be stunned a metal plate will come undone there allowing you to hit it with no def states on its part involved.