The Transformation table allows you to transform into an infinity of monsters.
Transformation
To transform into monsters, you need a captured monster and Transformation Seals with the type specified in Requirements.
Almost all capturable monsters can be used in the Transformation table and some of them act like monsters with no control (like chickens and bats).
Upgrade
To upgrade the monster type you need a lower monster in a different Transformation Seal specified in Requirements.
The new Transformation will always start at Level 5.
Sacrifice
At the "Sacrifice" tab it is possible to remove monsters from transformation seals and gem stones to get Black Souls.
Sacrificing 2 monsters at once will give a bonus. The bonus is bigger if monsters are of the same type.
Black Souls
To seal certain monsters or when upgrading any transformation seal it is necessary to have Black Souls. To get Black Souls for Sealing monsters, you need to sacrifice captured monsters or sealed monsters, after the Sacrifice you will get the Capture Gem back.