Aang, Airbending Master Azlask, the Swelling Scourge Azula, Ruthless Firebender Daxos the Returned Ezuri, Claw of Progress Kalemne, Disciple of Iroas Katara, Waterbending Master Kelsien, the Plague Meren of Clan Nel Toth Minthara, Merciless Soul Mizzix of the Izmagnus Otharri, Suns' Glory Toph, Earthbending Master Zuko, Firebending Master
The easiest way is to buy unopened Secret Lair boxes directly from Wizards of the Coast when a drop is live each box has a bonus card sealed inside
Toys"R"Us in Canada and the United States have announced that they will be hosting FREE TCG card giveaways throughout the year
Protection from everything might not mean much on a 10-drop creature like Progenitus, but granting that same level of protection to a player for a full turn cycle is down-right silly, and exactly the reason you see The One Ring in just about any format where it's [questionably] legal
Given how fast delirium will hit here, I have the delirium craziness of the bulk mythic Mindwrack Demon
Damage marked on permanents won't be removed until you actually get to the cleanup step (which will happen after your second end step), and "until end of turn" and "this turn" effects won't end until the cleanup step either