The reason is quite simple: if the back is printed, theres no way to check for security features on that side
Leonardo, Sewer Samurai's base cost is one White mana and three colorless, but the sneak cost is two White mana and two colorless, so the overall amount doesn't change, but the structure does
Outlaws of Thunder Junction Product Lineup Play Boosters Perfect for Limited Play and fun to open, with at least 1 foil card and the possibility of multiple Rare cards in every pack
On the plane of Bloomburrow, these archetypes are all related to a type of animal
Nahiri, Forged in Furys abilities make it a fine choice to lead or slot into the 99 of an Equipment-focused Commander deck
Delighted Halfling is an important mana creature because it has two toughness, which protects it from Wrenn and Six, and it makes Legendary spells uncounterable, which seems really important with Legendary spells that do something as soon as you play them, like planeswalkers, Yawgmoth, Thran Physician, or The One Ring