pokemon tcg prismatic evolutions cards - The colourful Pokémon TCG: Scarlet & Violet-Prismatic

It guards your artifacts, as long as its untapped

If you tap out to cast a Seething song at any point you are locked into red mana unless you have things like Chromatic Sphere to fix which is well worth it even if it is consuming mana rather than generating it (and yes, Sphere is typically better than Star in this deck as it works better with Yawgmoth's Will, not Welder but then that is going to be some kind of combo medley deck!)

Is there a legacy format for rotated cards

Her second ability is triggered

As a colorless Artifact that has a CMC of seven, it can add mana of any color once on the battlefield

Even the best Pokmon cards struggle to reach that mark, and promos have notably less quality control