The rod housed within the tomb is said to wake the slumbering.
The Day Watch
Increases Ceus, Tomb Guardian's DPS by 1e2300%.
Cadu guards the tomb under the bright veil of sunlight.
Twin Snakes (Cadu)
Increases Ceus, Tomb Guardian's DPS by 1e2700%.
The pharaoh enshrined within the tomb believed that, just as a snake is renewed through the shedding of its skin, he would someday be reborn into this world.
Increases Ceus, Tomb Guardian's DPS by 1e3100%.
"There cannot exist shadows without light."
All of Cadu's upgrades are for his brother, Ceus, Tomb Guardian. Being the elder, his upgrades come at a lower level and has lower effects than his brother's respective upgrades.
Heroes tend to have a lower DPS/ Gold ratio at base (a.k.a. "efficiency") the stronger they get. However, Cadu and Ceus have a higher efficiency than any other hero before them, making them incredibly useful.
The caduceus is the staff carried by Hermes in Greek mythology.