Chronos' lair was added in V5.0.05.
It is fifteenth biome in Pickcrafter. It can be unlocked in The Sun using 
Time Key and only if you reached prestige 15 or higher. Upon entering it Chronos will great you either happily or angryly.
His qutoes upon entering are:
'welcome'
'who dares to sneak in my lair'
After reaching this biome from prestige 15 and onward, and upgrading 
Endstone Pickaxe, the player can prestige
