Theres usually a small entry fee that often includes a booster pack
It's not quite as effective of a finisher as something like Moonshaker Cavalry at the same cost, and there are fewer ways to search it up or get it back from your graveyard, but it's also a third of the price in paper
Aang, Airbending Master Allied Teamwork Appa, Steadfast Guardian Captain's Claws Gather the White Lotus Gideon, Ally of Zendikar Hook Swords Invasion Reinforcements Iroh, Tea Master Jasmine Dragon Tea Shop Katara, Water Tribe's Hope Kyoshi Battle Fan Kyoshi Warriors Loyal Fire Sage Match the Odds Path to Redemption Pretending Poxbearers Retreat to Emeria Sokka and Suki Sokka, Tenacious Tactician Suki, Courageous Rescuer Suki, Kyoshi Warrior Sun Warriors Tolls of War Treetop Freedom Fighters Unified Front
Thanks to the overpowered Eminence mechanic, The Ur-Dragon can reduce the cost of your other Dragons casting costs, allowing you to develop larger threats at a competitive pace