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#3 I feel so much happiness just looking at these cards

Good question

Number iC (Chaos Imaginary Number)[edit] While "Chaos Numbers" are generally Summoned by performing Chaos Xyz Evolution on a 'regular' (non-Chaos) "Number", there was a single instance where Don Thousand performed a form of Chaos Xyz Evolution on a monster that was already a "Chaos Number", Summoning what he called a "Chaos Imaginary Number", referencing the mathematical concept of imaginary numbers

There has not been a lot of support for the Masked HEROs since they came out, but there have been a few new members to the archetype over time like Masked HERO Dian, the only female Masked HERO.