first edition shadow pokemon cards What are Shadowless in Pokémon TCG? Damage Swap As often as you like during your turn (before your attack) Proxy Charizard Holo 1st Edition

While Helga, Skittish Seer is a very strong card, the deck is perfectly functional without it, so even if it gets countered or removed, you have other tools to make sure you can play your spells

Shadow's effect isn't once per turn , so you want to only cast spells when you have an artifact to tap for them, so no opponent can interact with it and it'll always resolve

I wish that there was new art for this card, though

If an opponent controls an enchantment, exchange Confusion in the Ranks for that enchantment.

My gut tells me that your best bet is to choose a 1- or 2-drop since cheaper spells should be more common