From a cube design perspective, availability of mana fixing is unique in that it affects all of the decks in your environment, excepting mono-colored ones, not just decks in three or more colors

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Its not only not surprising this card was banned, its a wonder it didnt happen sooner
This set helps significantly boost decks themed on the Whole Cake Island and Fish-Man Island Arcs
You can send 2 face-up cards from your Spell & Trap Zone to the GY
That means it likely wont get OHKOd, but there is more Radiant Gardevoir [Lost Origin] reduces damage from opposing Pokemon V by another 20 to bring it to minus 100