When teaching MTG to one of my kids, I printed a couple of important notes like this one for lands, or how regeneration, fly and initiative works, or that you could use planeswalker's effects once a turn and put then in the relevant card's sleeves, as "trainers"
Biggest Omissions: Through the Breach $49.99 Magus of the Moon $24.99 Koth of the Hammer $14.99 Vexing Devil $9.99 Boom $8.99 Simian Spirit Guide $6.99 Greater Gargadon $5.99 Lava Spike $3.99 Lightning Bolt $3.49 Rift Bolt $1.99 Tarfire $0.99 Searing Blaze $0.99 Galvanic Blast $0.75 Much like Goryos Vengeance, Through the Breach is difficult to print and will likely keep getting more expensive
This has always been an expensive card, topping out around $120, but now it sits between $90-$100
These give specific rare and mythic rare cards an awesome, stylized treatment that explores what a horror movie about these icons of Innistrad would be like
Inventors' Fair Inventors' Fair is a utility land that does a little bit of everything for artifact decks
However, the ones players always seek out are the rarity bumps to the most useful cards