what packs have rare pokemon cards Pokémon Card GOD Pack! - 10 Ultra OR Full Art (Assorted Lot with a focus on Paldean Pokémon and fan favourites such as Mew Pokemon Holographic Pack - 10

Whenever you cast a spell with power, toughness, or loyalty equal to the chosen number, target artifact or creature becomes an artifact creature with base power and toughness X/X until end of turn, where X is the chosen number

To use it, you're going to need some support from a card that reduces its casting cost or gives you the ability to put a creature card from your hand onto the battlefield, like Elvish Piper, and Through the Breach

That being said, I still think there is opportunity in card markets

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