You can play Angel tribal, or Soldier tribal, or you can go the Voltron route
The best is Brainstorm since you draw three and then return two, so it's strong with putting back lands, expensive stuff, hiding from discard and reshuffling with fetch lands et all
As it enters the battlefield, it gets a number of defense counters equal to the number on the lower right part of the card
Most theft effects are tied to activated or triggered abilities, so cards like Strionic Resonator and Lithoform Engine ensure a bigger payoff
Rather than attacking like a good civil creature, they wait until a creature slips your opponents defenses, then unmask themselves to great effect
I immediately knew what I wanted to do with it, like, the exact image in my mind