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Who does it affect

Destroyer Golem

Despite its uses as both a political tool and a card draw engine, Mangara is very much a budget card right now

R Rare Super-Ancient Dinobeast X EARTH Level 8 [ DinosaurEffect ] ATK 2700 DEF 1400 You can Tribute Summon this card in face-up Attack Position by Tributing 1 Dinosaur monster

Some decks rely on timing and precision when it comes to bringing out their own win condition and making sure that that happens early on, players would have to bring out that specific combo that allows them to do so

Then theres another slot thats an uncommon Mystical Archive card in traditional foil that has a 50% chance of being a Japanese variant