Arahbo, Roar of the World fills that niche perfectly, offering great support both on and off the battlefield
It sets the deck up far better and has a discernible payoff
All Leader Cards are multi-colored
The term mind control refers to the M10 card Mind Control, even though Control Magic is strictly better and has existed since Alpha
One powerful idea is to combine Flash with Protean Hulk, where you Flash in Protean Hulk, let it die, search up Karmic Guide and Carrion Feeder, reanimate Protean Hulk with Karmic Guide, sacrifice it to Carrion Feeder for another trigger, fetch Kiki-Jiki, Mirror Breaker, use Kiki-Jiki, Mirror Breaker to copy Karmic Guide and sacrifice Kiki-Jiki to Carrion Feeder in response, which lets you reanimate with the Guide's ability