Moon-Drake, Kin Imposter

The "legend rule" doesn't apply to permanents
you control.

If Moon-Drake, Kin Imposter is your commander, choose a color before the game begins. Moon-Drake, Kin Imposter is also the chosen color.

{2}{u}{u}: Moon-Drake, Kin Imposter becomes a copy of target creature you control, except is has Moon-Drake, Kin Imposter's other abilities and is a jellyfish in addition to its other types.