Absolutely busted. Especially with the “summon 4 1/1s with rush” to clean up leftover minions.

With the card that summons four 1/1s with rush, and the new DK location, this is an auto concede for your opponent.

On curve with coin you nimwits

Dev Team – “hey you know how the community hates end of turn effects? Let’s give Rainbow DK it’s 2nd effect, on curve with the other one, and make this the strongest card of all time.”