Sand Worm

The Sand Worm is a boss creature added in Ultimate Survival Alpha 1.3.0.

How to Summon
The Sand Worm Fossil is a very rare ore that can be found in biomes under the biome subgroup, Desert. If ran through a Fossil Regenerator, you will gain a spawning gem, which, when used on the ground, will spawn the Sand Worm.

Biology
The Sand Worm bares strong resemblance to the Bakugan known as Wormquake. It is a serpent creature with spikes down it's body and a large toothed maw where a head should be. It's a dark brown in color.

Attack Pattern
The Sand Worm is a very simple boss. It dives into the sand and arches out above the sand at random points. When it flies up into the air, it targets the player's location to dive down at. It is best to attack the Sand Worm when it is emerging from the sand.

Drops
The Sand Worm drops Sand Worm Scales, which can be used to repair tools and weapons, and a trophy in the shape of the creature, proving you defeated it.

Trivia
The developers have stated that the Sand Worm is indeed based off of Wormquake from the Bakugan franchise.