how do adventure cards work in mtg does with Commander Tax? If you play a card

There will always be at least one monocolor option and one multicolor option, and no options will have exactly the same color identity as another

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

High-cost artifacts like Spine of Ish Sah or Wurmcoil Engine let you dig absurdly deep

With regards to the flickering, I just end up feeling kinda dull looking at it all

This is done with various mana dorks such as Helga itself, along with Fanatic of Rhonas, Gwenna, Eyes of Gaea, and Inga and Esika, the last of which turns all your creatures into mana dorks while drawing you cards