In terms of other colourless cards, I like Duplicant as a potentially free removal spell, Wurmcoil Engine for the value, Myr Battlesphere for early damage output and Steel Hellkite as a flying threat that can wipe out huge chunks of the board
Hardy of Myra's Marvels really reads as a vanilla creature lord of sorts since the cards with three lines of flavor text become really efficient creatures such as Memnite, Savannah Lions, and Quilled Slagwurm
FINAL FANTASY XIII I think the one thing I did in the set that consistently raised more eyebrows than any other aspect was doing a single meld pair: Fang and Vanille
Thankfully it can't be proliferated, as it exists in the command zone when in motion
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6th Rank: Kaito, Bane of Nightmares One of the newest toys of Dimir decks, it provides utility both in its expected color identity effect, raw accumulating power of his loyalty abilities, plus its latest gimmick for the tried and tested creature/planeswalker dual modes