A possible leaves trigger, three possible enters triggers, three possible death/leaves triggers from the tokens, another possible enters trigger if Siegebreaker dies or leaves the field and your exiled creature comes back, and it can be combined into blink combos and burn combos by itself
Japanese alt arts are available in War of the Spark and Strixhaven
You will see that the rest of the cards on this list are halo foils as well as full art cards, which mean that they are much rarer and more aesthetically unique than the regular foil or bordered versions of these cards

Abstract Paintmage Abundant Countryside Adarkar Unicorn Ally Encampment Altar of the Lost Ancient Ziggurat Ashling, Rimebound Automated Artificer Avengers Tower Base Camp Beastcaller Savant Boommobile Brotherhood Headquarters Bucolic Ranch Cargo Ship Castle Doom Castle Garenbrig Cavern of Souls Chandra's Embercat Clement, the Worrywort Codsworth, Handy Helper Commodore Guff Cormela, Glamour Thief Corrupted Crossroads Creeping Peeper Crucible of the Spirit Dragon Cryptic Trilobite Cultivator Drone Curious Homunculus Dalakos, Crafter of Wonders Delighted Halfling Discreet Retreat Eclipsed Realms Eldrazi Temple Elementalist's Palette Elfhame Druid Fabrication Foundry Flamebraider Food Chain Freya Crescent Galazeth Prismari Gallifrey Council Chamber Geosurge Giada, Font of Hope Gnarlroot Trapper Grand Architect Great Hall of the Biblioplex Great Hall of the Citadel Guidelight Optimizer Gwenna, Eyes of Gaea Happy Dead Squirrel Haven of the Spirit Dragon Helga, Skittish Seer Herd Heirloom Hermitic Herbalist Humble Naturalist Hydro-Channeler Ice Cauldron Immortus, Master of Eternity Inga and Esika Interdimensional Web Watch Interplanar Beacon Intrepid Stablemaster Ixalli's Lorekeeper James, Wandering Dad James, Wandering Dad Jasmine Boreal of the Seven Jasmine Dragon Tea Shop Jaya Ballard Jeweled Lotus Karfell Harbinger Klauth, Unrivaled Ancient

Them : I doubt we'll change it
For Streets of New Capenna , the same kind of tri-lands were introduced to complete the remaining color combinations