Ankylosaurus

The ankylosaurus is a powerful, squat dinosaur more than capable of defending itself against enemies. Its back is heavily armored with thick bony plates and spikes. A solid blow from an ankylosaurus’s tail can leave most creatures stunned long enough for the armored dinosaur to make good an escape, although once confronted, most ankylosauruses can become too ill-tempered and stubborn to flee. In those cases, they stand their ground and use their tails to great effect in battle. An A’qadia ankylosaurus is 30 feet long and weighs up to 6,000 pounds.
On land they are moderately quick, but only really demonstrate their speed when in the desert sands. There, due to their natural armor and the shape of their head and body, the ankylosaurus “swims” gracefully through the sand. It is not unheard of for an ankylosaurus to “swim” in the sand as fast as a horse can run over solid land.