Im only really interested in Frenzied Gorespawn as far as Rakdos, and its a solid extra copy of Kardur, the Doom Scourge (but only for stuff in play right now)
She drills through the deck for Gate to the Afterlife and allows you to recast it if you untap with her
These will always detail how and when you use them, although it should be noted that many abilities for lower level characters will often exert the card which is symbolised with a small icon indicating a turning arrow
Likewise, the creature removals just too weak and gives players the buyout of sacrificing an enchantment to keep their Voltron creature intact
Or maybe just create something cool for Netrunner
Part of the reason is just the sheer amount of excellent art in the set, which the publisher says contains the largest collection of Final Fantasy artwork ever in a single game. But another big reason are the goofs, which are deeply embedded into the mechanics of the popular trading card game