Cards Between $5-10 Bloodbender's Rise / Bloodchief Ascension Bumi, Unleashed Dockside Extortionist Mayor Tong of Chin Village / Drannith Magistrate Lifelong Friendship / Eladamri's Call Fabled Passage Fated Firepower Ozai, the Phoenix King Planetarium of Wan Shi Tong Redirect Lightning Sozin's Comet The Legend of Kuruk / Avatar Kuruk The Legend of Kyoshi / Avatar Kyoshi Volcano of Roku's Island / Valakut, the Molten Pinnacle White Lotus Tile Cards Between $10-15 Avatar Aang / Aang, Master of Elements Heroic Intervention Joo Dee, Public Servant / Sakashima of a Thousand Faces The Legend of Roku / Avatar Roku Promos, Alternate Art, and More Avatar: The Last Airbender has a lot of alternate version cards with special art treatments, both in TLA and TLE
Split cards also include the aftermath cards released in the Amonkhet block, though they have some extra rules complications
Solar Array
Its not hard to cast two spells in a turn, and with at least two cards incidentally hitting the graveyard almost every turn, you can use Firja for something a little more natural to Orzhov: Reanimation
Tormods Crypt Often seen gracing sideboards, Tormod's Crypt is a useful bit of graveyard interaction that doesnt cost anything