Clearing out an entire board is no joke, and it's hard for anyone to avoid if it comes in swinging straight away
It's called a preconstructed deck, or a precon
Making matters worse, to support backup commander Zaxara, the Exemplary, the deck also has some random X-spells that are not especially playable as well as creatures like Hungering Hydra and Vastwood Hydra, which don't do much to support the primary mutate theme (other than possibly add a creature with some +1/+1 counters to the battlefield to mutate on)
Side loading pockets make inserting your cards easier, yet help prevent card spills
It's an aggressive deck that looks to its graveyard to provide it with resources other strategies can't access, surprising foes with unexpectedly explosive plays
Lady is sitting gracefully in a glowing basket that blends itself into the magical environment as she looks on at her friends and a baby carriage in the distance