These cards are identified by a black star symbol with the word PROMO written across it, hence why theyre also called Black Star Promos. The demand for these cards varies, mostly depending on how difficult the Promo was to obtain or how popular the featured Pokmon is
I'm not sure how much Archfiend would need this, but the DARK Dragon-Type effect could just let you draw without the discard and still be fine, unless you have planned to take advantage of the discard in some way, which DARK monsters often do, but I don't think the decks that could use this card will really go for that
Deck Description I would like to thank Dizzia Forest for sharing their deck with everyone
Behold: Whenever a Dragon you control enters, put a +1/+1 counter on Sarkhan
Fiend/Effect Level 4 ATK/0 DEF/2000 As long as this card remains face-up on the field, monsters that are destroyed as a result of battle are returned to the owner's Deck instead of being sent to the Graveyard
So Id probably only run her if I know my own graveyard is going to be full