This doesnt seem very funny at first, but think of the possibilities
This means that in every two-color combination, you should be able to find a least six really strong MDFCs, and if you reach down into the "often play" category, you should be able to find eight or nine that are worth putting in your deck
Let's look at each reason in turn: Vigilance - Since you want to swing to gain the Monarch and block to keep, enter vigilance letting you do both and ideally on an evasive dork like Serra Angel
Regardless of when in the game Maui - Hero to All comes to the hand, his inkable nature allows any interested player to run him at a higher number of copies, usually at 3, but some players may prefer him at maximum
That combines naturally with Voltron commanders though you won't rebound commander damage to other players
With a Singer 5 at a three-Inkable cost, along with a situationally handy ability, I would say this card is quite likely to see play