Once you reach the required wave it unlocks and when you move over it, it will display a tooltip. If it doesnt you need to reload the game as ive uploaded the fix a while back.
Theres a glitch (at least at the start after sailing away) where the ritual repeat system doesn't work I put it up for 4 repeats and it only did the ritual once
Guys the existence of the premium upgrade shop is annoying but at least the permanent upgrades don't increase in price (for what i've seen i'm not paying I just got it via tile gained amber)
for heritage I have the greek empire first bonus that allows me to have 2 pantheons but if I heritage it makes it will always be the first one I bought if possible please make it possible to select which one
for hero ( I haven't gotten far so i don't know if there are any monsters other than rat spider and crab) the best build is at level 5 hammer (lvl 4) damage reduction shield (lvl 4) and the bonus damage per kill helmet (lvl 5)
 "Progress Fight"){kind=icon}
 "Final Infection"){kind=icon}
 "Defender Idle"){kind=icon}
 "Territory Idle"){kind=icon}
 "Maid of Venia"){kind=icon}
 "Idle Skilling"){kind=icon}
 "Below Kryll"){kind=icon}
 "Paper Knight Quest"){kind=icon}
 "Warbanner"){kind=icon}
 "Age of War"){kind=icon}
 "Pre-Civilization Bronze Age"){kind=icon}
 "Everybody Edits"){kind=icon}
 "Demon War: Idle Rebellion"){kind=icon}
 "Lil' Conquest"){kind=icon}
 "Code Red"){kind=icon}
Once you reach the required wave it unlocks and when you move over it, it will display a tooltip. If it doesnt you need to reload the game as ive uploaded the fix a while back.