These are inserted randomly in packs, though at a higher rate in so-called collector packs
Like most Pokmon cards, the value of Ho-Oh-GX depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Burning Shadows)
Nekusar, the Mindrazer One of the best Grixis commanders overall, Nekusar, the Mindrazer is the best forced-draw and wheel commanders thanks to its card draw ability and color identity
Okay, I did eventually reinstall the game, but I've not spent a single penny on resources or the battle pass since
The Extra Deck is one of Yu-Gi-Ohs biggest draws and adds an entirely new aspect to deckbuilding