Monster Lab is a Building created by Dr. Viktor to make Monster Cells!
You can use these Cells to:
- Craft new Monsters
- Extract Cells from Monsters
- Rank up identical Monsters

It can be unlocked from level 20 but will need to be repaired first before it can be used.

The Monster Lab Building can be upgraded to level 5.
Each upgrade gives you the opportunity to Rank Up your Monsters to the same level as your Monster Labs Building Level.

Level 1 - Repair the Laboratory & Craft
Level 2 - Rank 1 available
Level 3- Rank 2, requires Level 30
Level 4 - Rank 3, requires Level 35
Level 5 - Rank 4, requires Level 45
Level 6 - Rank 5, requires Level 55

Ranked-up Monsters can level up beyond their natural maximum.
For Example:
A Monster could be maxed out to level 100, but Rank him up and he can hit 130.