F4MU9 is the number two (2) in the series of his breed. F4MU9's favourite place to hang out with other mutants is a swamp.
F4MU9 is a rare breed and its rarity level is 'Ultra rare.' The maximum number of his kind is only 2.
Source: 'Monster Mash 2019 Day IV Finale'
F4MU9 is an unique Mutant Monster for your team!