I mean, it was a Cube, so they certainly arent the worst creatures out there or anything
Black Luster Soldier was unique at the time for being a monster with two separate, but useful effects
The flavour text on that card allegedly reads, We dont make mistakes, just happy little accidents. This is a popular quote from Ross popular and long-running television show, The Joy of Painting
Both of them do a good job of showing up the expansions new mechanics and key features, and after playing them I dont think a third one would have been necessary, especially because it would have just been another Ruby/Emerald like last time
BPhillipYork: This is a solid enough ability, and red can discard a lot, and benefit from it, so fairly easily to make a discard/draw red black deck around this ability
Banish 2 Shiranui from your GY, Summon Nether, then trigger your Shiranui effects for profit