Coin per minute:
|Lvl. 1||Lvl. 2||Lvl. 3||Lvl. 4||Lvl. 5||Lvl. 6||Lvl. 7||Lvl. 8||Lvl. 9||Lvl. 10|
|Lvl. 11||Lvl. 12||Lvl. 13||Lvl. 14||Lvl. 15||Lvl. 16||Lvl. 17||Lvl. 18||Lvl. 19||Lvl. 20|
- The Ouroboros Dragon was released on July 18, 2013.
- Initially, the Ouroboros Dragon was available at level 17, but the level availability was changed on October 9, 2013, to level 18.
- The Ouroboros Dragon's breeding and incubation times of 26 hours 24 minutes when converted to 1584 minutes is likely a reference to Jacopo Brocardo, an Italian biblical event interpreter that wrote commentary on the apocalypse. He believed 1584 would be the beginning of a new cycle, and spent many years writing about the biblical apocalypse in correlation to life in late 1500s France.
- Ouroboros(Greek: Ουροβόρος, from ουροβόρος όφις “tail-devouring snake”) is an ancient symbol of a serpent or a dragon swallowing its own tail and forming a circle.
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