A colony with 10 mermaids
A colony with 20 mermaids
A colony with 30 mermaids
A colony with 40 mermaids
A colony with 50 mermaids
Use the final spell
A cluster of 5 dwellings with 10 mermaids
Destroy items in a storehouse
Destroy all ruins
Store 20 gems in your throne
Plant next to a hydrothermal vent
Ask dead Episteme for help