Death Ray

The Death Ray only appears on one level, but it is a VERY powerful tower. It starts out preplaced. Unfortunately, however, you must spend a whopping $15,000 to activate it before it can do anything besides getting in the way(You cannot place towers on it.

Base Stats
Damage: 8000

Firing Speed: Supersonic

Range: Infinite

Special: Shots weaken the Yeti boss for 5 seconds.

Cost: 15,000

Upgrade 1
Damage: 9000

Firing Speed: Supersonic

Range: Infinite

Special: Shots weaken the Yeti boss for 10 seconds.

Cost: 3000

Upgrade 2
Damage: 10,000

Firing Speed: Supersonic

Range: Infinite

Special: Shots weaken the Yeti boss for 15 seconds.

Cost: 3000

Upgrade 3
Damage: 15,000

Firing Speed: Supersonic

Range: Infinite

Special: Shots weaken the Yeti boss for 20 seconds.

Cost: 9000

Upgrade 4
Damage: 30,000

Firing Speed: Supersonic

Range: Infinite

Special: Shots weaken the Yeti boss for 25 seconds.

Cost: 20,000

Weaknesses

 * Yeti(Does 0 damage when the boss is not weakened, and it does 0 damage per shot to a weakened yeti, 1 for upgrade 1, 2 for upgrade 2, 3 for upgrade 3, and 4 for upgrade 4.)
 * Fire elemental enemies(only appear on the survival mode of the level this appears on.)

Trivia

 * This is the only type of tower that appears preplaced.
 * This is the only tower that cannot be sold or destroyed.
 * This is the only tower that cannot be bought.