one piece extra booster box EB-03 Heroines Edition Japanese in fact One Piece Card Game Extra

It enters untapped and can immediately generate any color of mana

As far as R&D is concerned, it is the theme discard cards that cause the most unhappiness as discard decks are one of the scary three (land destruction, permission and discard) that tend to keep people from playing the game and thus tend to annoy players at a much higher level than other decks

It turns out that the monastery on Regatha that Chandra ends up at was founded by none other than Jaya Ballard, a pyromancer of old-time Magic fame

By tapping it and any other untapped permanent you control, you get one mana of any color

You can build a sea creatures deck around this, and it could probably work

Commander opens the door to ambitious three, four, and five-color decks that take advantage of longer games