HAHAH I want to see everyone get owned when they don't have piercing defense and get their Vog Cub gear shredded into pieces by a bunch of spiky slimes.

I want a reason to have piercing defense other than my clumsiness... running into spikes...
Here are some ideas to save you the trouble...

Glass Jelly - ....
Land Shark - T3 MONSTER! swims on land, "teleports" sorta ash wolvers, but it dives instead of poofing, yeah you sorta get the point right...
Older Sister - LOL I just wanted to add this, it doesn't really have to be added... but it would be nice... scratches you with her sharp nails @_@
Paper Plane - Similar to greaver... but a paper plane... could be a rare type of greaver
Cactus zOMBIE - ..........................
Gun Puppy (that shoots spikes) - .............