Have you began breeding certain monsters?
In phase 1, which lasts for just 1d23hrs, I am aiming for Salamander. However, just got 22hr breed time, so it will not be Salamander. This means I only get more chance (as a F2P).
In phase 3, I am certainly aiming for Kihaku. Might even save my gems all week.
Just so you know - double gems at Monsterwood for 2 days. 12 gems available in Irockman Monster Dungeon, and 12 gems available in today's Book Dungeon. Tomorrow's Survival Dungeon will also have 12 gems available. Then the Gem dungeon on Wednesday with about 25 gems up for grabs. So get saving so you can speed up your hatching!