Im not sure that cost matters, especially when you can gain lore when it enters
I dont love how this trades with a two drop, but its nevertheless a two-for-one with not-awful stats and more likely to trade with a three drop on defense
This Zombie Dragon works perfectly in a deck with more than twenty Dragons in it
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

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
If youre just going for mana fixing, I prefer something like Skyshroud Claim for my 4-mana investment