Like most cards in this drop, you're not likely going to be building Squidward as his own commander, as the effect is pretty limited
If you dont, you may put a land card from your hand onto the battlefield. If you can plot a card, cast something from your graveyard, from exile, from someone elses hand or directly from your deck, you can put something of your choice into play from your hand
Pikachu #HGSS03 (Pokemon Promo | Pokemon Cards) prices are based on the historic sales
Food Gingerbread
Nightmare Moon / Princess Luna It takes 6 mana to transform Nightmare Moon the same way it took the six Elements of Harmony wielded by Twilight Sparkle, Rarity, Applejack, Fluttershy, Pinkie Pie, and Rainbow Dash to do so in the show
By doing this, you can't guarantee that they will be valuable, but it's a great way to build up our collection