Absolute monstrous Demons. Ther take 95% reduced damage from tamed Dino’s and at their weakest have 21k health. Can also pick you up from your mount, fly you high into the air and then drop you. I’d suggest in investing in creatures with the bleed affect. If playing on a server that allows for Dino transfers. Bring reapers to ground them and bring Deinosuchus to chomp them. I barely won on Gamma difficulty