As a fan of the titles set in Unova, these cards that feature the Legendaries are also my favorite ones so far, and will be high on my list of desired cards from the set
The SIR lineup is solid
The Power 9 were found in the Alpha, Beta, and Unlimited sets of Magic: The Gathering
Abyssal Harvester Arbiter of Woe Bloodletter of Aclazotz Bone-Cairn Butcher Bringer of the Last Gift Chaos, the Endless Demon Wall Desecration Demon Doomsday Excruciator Fiendish Panda Gurmag Rakshasa Ifrit, Warden of Inferno Iron Giant Madame Null, Power Broker Miasma Demon Perforating Artist Rakdos, Patron of Chaos Rakdos, the Muscle Reckless Detective Rot-Curse Rakshasa Rune-Scarred Demon Savanti Romero, Time's Exile Shefet Archfiend Sower of Chaos Summon: G.F
Also sneaking in at above $10 was Karlov of the Ghost Council , with a value of around $13, and Lord of the Void , with a selling price of around $11
No matter the incarnation of the spell, the structure is the same: you get a bonus for casting an instant or sorcery, and if you spend five or more mana you get an even bigger bonus
