The first is that WotC put a lot of support behind Arena to reach a broad audience, and part of that is more MTGA-exclusive content including consistent ranked matches, best-of-one and best-of-three events
As a starter deck, this one is remarkable for many reasons
Most of the cards' other versions are only a couple of dollars cheaper, so even if you only have that version, it is still worth alot
Kyoshi Warriors Invasion Reinforcements White Lotus Reinforcements Earth Kingdom Soldier Compassionate Healer Jet, Freedom Fighter Serpent's Pass The Cave of Two Lovers Tolls of War TierB- Bender's Waterskin Momo, Playful Pet Sokka, Lateral Strategist Gran-Gran Forecasting Fortune Teller Earth Kingdom Protectors Messenger Hawk The Mechanist, Aerial Artisan Agna Qel'a Deadly Precision Cat-Gator TierC+ Badgermole Knowledge Seeker Sold Out Kyoshi Battle Fan Firebending Lesson Airbender's Reversal Glider Kids Guru Pathik Boiling Rock Prison Kyoshi Village Misty Palms Oasis Watery Grasp Canyon Crawler Octopus Form TierC Jeong Jeong's Deserters Fire Nation Warship Merchant of Many Hats First-Time Flyer Pretending Poxbearers Toph, the Blind Bandit Enter the Avatar State Otter-Penguin Katara, Bending Prodigy It'll Quench Ya
Im not sure that cost matters, especially when you can gain lore when it enters
Maximizing Fell Stinger requires sacrificing a creature to its exploit ability, but in return, you get to draw two cards at the cost of losing two life