S.A.N.D.W.O.R.M.

The S.A.N.D.W.O.R.M. (Subterranean Abomination Digging the World's Mazes) is a freaking enormous worm that digs holes in the sand. Need I say more? massive mining device that has only 200 HP, but it can only be damaged by Mortar Monkeys, W.A.A.R.M.s, and Pineapples. Why? Because it goes underground! (The shockwaves from the W.A.A.R.M. penetrate the ground, and the explosions from the Mortar Monkey and Pineapples do so, too.) Like I said, it's a worm. Therefore, it goes underground. It digs a tunnel that loops around the screen randomly and heads to the exit, and it does so at the speed of a Z.O.M.G. It is operated by a crew of six Ceramic bloons and five camo Lead bloons. Yikes! However, as soon as the S.A.N.D.W.O.R.M. is destroyed, the bloons go through the tunnel dug by the machine to the start of the track. This gives you more time to deal with the operators.

Abilities

 * Earthmover: (passive) All monkey towers, machines, and buildings on top of where the S.A.N.D.W.O.R.M. is digging take 1 HP damage every second they are on top of it.
 * Deep Digging: Digs so deep, it is immune to ANY AND ALL forms of damage for five seconds! Yeesh!
 * Surfacing: (requires Deep Digging to charge up first) Digs straight up (in a 3-D sense) and INSTANTLY kills all towers within a radius I will specify later. Flying towers, giant buildings, and fortresses are immune to this. However, on the surface, any tower can target it during the attack and for about ten seconds afterward. After it waits for five seconds, it jumps to a random point on the screen and begins digging again.

Trivia

 * This machine's status as a kung-fu-proof boss in mook clothing is a reference to the Dune Terrors in Kingdom Rush: Frontiers. (Yes, I know that Dune Terrors don't have that much health.
 * The Surfacing ability is a reference to a completely different sandworm from the same game!
 * This... thing appears only on desert-themed tracks.