It is best if you stay with the color of your first choice
That may sound slow, but assuming youve also got a few one mana creatures like Ruin Crab, which mills whenever you play a land, and maybe a couple of copies of Tashas Hideous Laughter, then you can easily take someone out by turn six or so with this strategy
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Whenever another creature you control enters, if it wasn't cast, put a +1/+1 counter on Rapid Augmenter and Rapid Augmenter can't be blocked this turn
Chandras Regulator This is an auto-include if youre running a bunch of Chandras, but the repeated rummaging is good on its own
Weakness: Metal (x2) Resistance: none Retreat: 1 Jigglypuff Psychic HP60 Basic Pokemon [P] Pound: 20 damage