Some patrol the halls, killing any intruders they come across, while others dumbly go about some other task: gathering materials or repairing damage to the tower. Either way, they tirelessly execute their programming. The guardians and workers have distinct runes etched into their carapace, but only the mad wizard knew the difference. Instinct: To implacably carry out a simple task

• Crush and dig with metal claws
• Fix something with metal probes
• Destroy the intruder
• Flee from the intruder, then return to continue working

[They] carefully entered the cavern, and were instantly assaulted by the scent of blood. The cavern floor [...] was deep with the creatures’ blood-red guano. (Tim Richardson, “Ecology of the Stirge”) Instinct: To suck blood

• Attach to an enemy
• Redirect an attack to its prey.
• Drink blood through its proboscis.
• See in the dark