Monster Power, often abbreviated MP, is the total power of all of a player's monsters. This metric is used to determine a player's relative strength and is used as a threshold requirement for joining many teams. The more unique monsters a player has, the higher their MP.
Each level a monster is fed to contributes one point to Monster Power. Only 3 copies of a particular monster contribute to MP. Additional duplicates of a monster, beyond the first 3, do not contribute to MP. Ranking up a monster and feeding it to its new maximum level provides a significant increase in MP.
The chart below displays the maximum MP a monster of various rarities and ranks can contribute:
Additionally, a monster's contribution to MP can be increased by equipping runes. Runes of higher levels contribute more to MP. Each level of a rune will add 1 point to the MP.