base set pokemon booster pack Unlimited Long Crimp GX featuring a brand 1999 POKEMON BASE SET CHARIZARD

I recently made it up-to-date because prior to Secret Santa I was kinda out of it and basically hinted at if its not in the sheet, I dont have it

The card in the photo is exactly the card you will receive

1x Alt-Art Arcane Signet 1x Alt-Art Commanders Sphere 1x Alt-Art Chromatic Lantern 1x Full-Art Gilded Lotus 1x Full-Art Darksteel Ingot MTG Arena Redemption: One (1) single-use code for one MTG Arena Artist Series: Seb McKinnon Themed Sleeve (may be available later for separate purchase in MTG Arena)

These attacks are especially powerful, so the Terapagos ex Ultra-Premium Collection provides a serious advantage with its three Stellar-type Pokmon Trading Card Game cards

But what even is Commander, and how do you play it