Modern format has been graveyard-reliant by its start (remember Tarmogoyf being the threat of the format for 5+ years ) and even in 2022 many tier 1 decks (Murktide/Living end/etc) relies on GY
Gagaga Child X DARK Level 2 [ Spellcaster / Effect ] ATK 800 DEF 1200 If you control a "Gagaga" monster other than "Gagaga Child", you can Special Summon this card (from your hand)
send it to the GY, also, after that, if it left the field by this effect, Special Summon from your Extra Deck, 1 "Masked HERO" monster with the same Attribute, but a higher Level than, the Attribute/Level the monster had when it was on the field (its original Attribute/Level, if face-down)
Now that you know how to effectively spot a rare, valuable Pokmon card, here are some reasons you should (and shouldnt) buy it
Professor Onyx Getting an edict stapled to a planeswalker is rarely bad