They dont make them castable or playable
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Once per turn, if you control at least one HERO Normal Monster or a HERO Fusion Monster, you can discard a card to activate 1 of these Skills based on the HERO monsters attribute: If youve got an EARTH HERO, destroy an EARTH monster you control and a face-up monster your opponent controls If you have a WIND, blow away a face-up Spell or Trap Card A FIRE will let you return all face-up non-FIRE Special Summoned monsters back to their controllers hand A WATER HERO will get you a free draw, and until the end of the next turn, you can activate one Normal Trap straight from your hand If youve got a LIGHT HERO, you can change the battle position of a face-up monster on the field You can only get one of these effects per turn, but some of them are wildly powerful and the sheer range of options is massive

Date: 30 June 2023 The new Zillion Thunder gives more strategic options to Monarch Decks with the inclusion of Ehther the Heavenly Monarch. It also contains Armed Dragon Thunder LV10 that gains effects based on its own ATK
You want to play for to be able to get them all in the Lost Zone with Lost Blender and to improve your early game while still having some that are disposable with the aforementioned Lost Blender
When the meld ability is just gravy, its easy to justify featuring both cards in a Cube