Dark Altar

Evil Duration
All Idols last longer during the Apocalypse.

Evil Wrath
All Idols do more damage.

Inner Peace
Gain more souls during the Apocalypse.

The following 3 technologies require 1 crown to unlock:

Teenage Angst
Idols gain more damage each second.

Hidden Reserves
Gain more damage per tap during the Apocalypse.

Greater Harmony
Gain more souls during the Apocalypse.