halloween mewtwo pokemon card with pikachu stamp Promo Retreat cost Mewtwo - 056/172 Holo Rare

That does not require that you do so with the same or others, so you could choose to swap your dumpy 2/2 Commander with a lot of text with your much bigger 7/7 Hydra that you cast to beat away

While its unlikely to give you much of an indication, it could be another way to discover whether the game is legitimate, or even in good working order

Mountainwalk The affected creature cannot be blocked as long as the defending player controls a Mountain land

Cube is a way to build a customizable set of cards for limited draft with your friends at the game shop in your play group

Dice, Tokens + Lore Trackers The tokens you get with the starter decks are fine for displaying damage, and you can use the official Lorcana app to keep track of your Lore