yugioh ancient sanctuary booster box Official Cards / Korean Ver / 40 Packs / 5 Cards in 1 Pack Toys & Games Ancient Guardians will also include hard Yu-Gi-Oh! TCG: Ancient Guardians Booster

Even without Steve Rodgers, this is a card to watch

You can obtain the Miltank (1-Star rarity) card by opening Mega Shine from Mega Shine set

Is it going to make Commander more fun to have a creature that can shut down your opponents' games

It really is

Like most Pokmon cards, the value of Miraidon 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 (Scarlet & Violet Black Star Promos)

As such, you will be finishing with a lot of card advantage and, hopefully, a monster that prevented your opponent from special summoning a monster