Spirit's Lake

From Dragon Quest Wiki

The Spirit's Lake is a lake in the northern part of Ice World in Dragon Quest Monsters 2. The spirit there will give Cobi or Tara a Crest necessary to meet with the leaders of the three kingdoms. Later, the lake is the site of a boss fight against two ArcDemons and a GoatHorn, after which the spirit thaws Ice World's frozen central lake and gives the Hero the SkyShield.