yup the gelnika it is d£v!l'$ ph0£n!x

you've got most of the reasoning down too...
the last line is really morphing (breaks and bend reality for items)
and the strong defence is hinting at the emerald weapon which is sometimes located in front of the gelnika, and also you got the part about raising your strength by changing the enemies into various sources... soo you're up d£v!l'$ ph0£n!x !