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This phrasing is likely in order to specifically exclude cards that incidentally include in their Japanese names, such as "Clock Spartoi", as well as "Toy" spells unrelated to Yugi's deck

Having said that, Mask Change II is no joke, as it can allow non-HERO decks access to Masked Hero monsters

if used from your hand, you add it to your hand, and if used from the field, you Special Summon it

Demise, Supreme King of Armageddon, well it's a boosted version, the only real downside is that it's 2 Levels higher, but that's not a problem with the Devritual support, as well as cards like Ritual Raven

Once per turn, when you inflict battle damage to your opponent with this effect: You can draw 1 card