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. Although at this stage of the game, the scaling of the monsters health make it difficult for the twin brothers to do decent damage, progressing a few thousand zones each ascension.
He is one of the only 2 heroes to give a DPS bonus to another specific hero, with the other Ceus, Tomb Guardian.
The caduceus is the staff carried by Hermes in Greek mythology.