Oasis type creature it was added in the adventure pack that released parallel to scorched earth. It is capable of reviving lost tames.

Add this to more maps. Like Lost Island and etc. Make them spawn in deserts.

Run because it might kill bob if he is standing to close to and attacks it he will die in two shots or 1.

These Gentle giants are passive and will flee if attacked.

So it's a Megachelon who flew

Quetzal, but Megachelon

~ CPG (completely guessing off the description)

To tame it you need to kill a creature and take its soul or whatever, then take that and put it in the oasisaurs inventory, this will start a mini game where you will protect the soul/dead creature until the oasisaur is tamed

Where do u find them? In Ada of course