For less full-on solutions, you could also alter official tokens with brightly-colored sharpie, or sleeve them up in different-colored sleeves
This is where the likes of Charizard in Relentless Flame, Groudon in Towering Heights or Rillaboom in, well, Rillaboom, rule supreme
It effectively kills off creatures that dont look like the creatures already on the table
The second aura is a 3-drop rare in Black that gives evasion with flying, +3/+1 and like Blade will make it a Demon, just in case you care
The tempering of the dice result based on hand size is an interesting design space in that it slightly mitigates the inherent issues with dice rolling
the owner of said collection has kept his identity secret, going only by Dubsy