Death Ray is a card that projects a rotating beam from your tower, instantly killing any standard enemy the beam touches. It is one of the card-based instant-kill options available, but it comes with clear limits on what it can hit.
Description
Death Ray produces a beam that sweeps around your tower and destroys every enemy it makes contact with. The kill is instant, so anything the ray passes over is removed without needing damage.
As you upgrade the card, the beam's coverage grows. At maximum level, the ray rotates through more than 180 degrees, giving it much wider reach around the tower.
Use
Death Ray has two important restrictions. It cannot kill bosses, and it cannot kill any enemy sitting inside a protector's radius, so protected enemies will pass straight through the beam unharmed.
Because of this, Death Ray works best as a tool for thinning out regular waves rather than as an answer to tough or shielded targets. You still need other defences to handle bosses and anything guarded by protectors.
Double Death Ray
Double Death Ray is a lab upgrade unlocked through Milestones at tier 3, wave 300. Once researched, it gives a chance for a second beam to spawn alongside the first, and upgrading the lab increases how often that happens.
When it triggers, the second beam always appears on the opposite side of the tower from the first and rotates in the same direction. The lab has 30 levels, and the activation chance at each level is listed in the table below.
| Level | Time | Cost | Value |
|---|---|---|---|
| 1 | 0d 0h 59m | 2.5M | 1% |
| 2 | 0d 9h 21m | 2.81M | 2% |
| 3 | 0d 17h 53m | 3.42M | 3% |
| 4 | 1d 2h 54m | 5.83M | 4% |
| 5 | 1d 12h 49m | 13.94M | 5% |
| 6 | 2d 0h 6m | 35.25M | 6% |
| 7 | 2d 13h 17m | 82.06M | 7% |
| 8 | 3d 4h 58m | 172.67M | 8% |
| 9 | 3d 23h 49m | 332.58M | 9% |
| 10 | 4d 22h 31m | 595.69M | 10% |