However, today's other topic is a new card I discovered upon getting back home.
Archfiend Empress...the STBL sneak promo.
If exactly 1 face-up DARK Fiend-type monster on the field would be destroyed except this card, you can remove 1 DARK Fiend-type monster from your Graveyard instead. If this card is destroyed and sent from the field to the Graveyard, you can select 1 Level 5 or higher DARK Fiend-type monster in your Graveyard, except "Archfiend Empress" and Special Summon it.
Well, this is certainly an interesting card for Fiend decks.
Protect your Caius, Dark Ruler, Dark Necrofear, or any other Fiend (perhaps Infernities) from any single destruction, but that's a rare thing.
What makes this card interesting is that when it's destroyed you bring back a high level fiend from the graveyard in exchange. Now, Dark Necrofear would be my prime candidate (gotta check the rulings, not sure at the moment), as well as Ambitious Gofer, Dirg the Dark Monarch, and Gorz.
Something fun to keep an eye on.