|Unlock criteria||Upgrade The Egg|
|Initial cost||10K food|
|Cost increase||Yes, by 1.05x per level|
|Effect|| 5% multiplicative increase to gem gathering speed
"Pay a tribute of food to your Dragimp, increasing his appetite and his speed. He will gather gems 5% faster (compounding)."
Tribute is unlocked after retrieving The Egg in Zone 17. The Egg is guarded by a random common monster in the center cell of the zone and it is denoted by a eye-like icon. Once the monster is defeated and The Egg is researched through the 'Upgrades' tab, you have unlocked the Tribute structure and may start upgrading it.
Tribute is used to increase the Dragimp's production rate.
Because the cost of each level and its effect increases at the same rate, the cost of each level upgrade is effectively 20,000 times the gems/second before motivation perk and production increasing factor.
The equation used to find base gems/second is:
(0.5 * (1.05 ^ [Tribute Level]))