You see Crystalcrusher
"Creak!", "Crackle!"
Notes
Often found with other earth-based creatures like Wigglers, Wyverns and Earth Elementals. They play a critical role in the Bigfoot's Burden quest line.
Abilities
Melee (0-170), Poison Bomb (110-270), weak Self-Healing (5-15, often), strong Self-Healing (120-180, occasionally).
Damage Taken From Elements
Physical 
Death 
Holy 
Ice 
Fire
Energy
Earth
Location
Behaviour
Crystalcrushers prefer to fight in close combat. A crystalcrusher never retreats.
Strategy
Kill them as quickly as possible, rather than trying to run them, since they hit harder and run faster than one would expect. Always try to kill them one by one. An encounter with more than one of these could easily send you to your death.
Loot
0-90 gp, Brown Crystal Splinter, 0-3 Crystalline Arrows, Blue Crystal Splinter, Green Crystal Splinter (semi-rare), Crystalline Spikes (semi-rare).