I see the power here, but in a game thats been power crept since Coldsnap (?!??), a 6-drop that opponents have to decide they let trigger seems like a terrible deal
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Eventually, with a little help, it turns into a Double Strike monster that pumps itself and hits for incredible amounts of damage
The deck also features a number of card draw spells to help you draw for your deck to find the planeswalkers (some effects even allow you to tutor for specific planeswalkers), and acceleration spells to help you quickly summon your planeswalkers
Rigos types are horrendous as a Cat Citizen, and white threes are a fairly crowded space, so I can see this one succeeding in fewer Cubes than I initially estimate