Its three currencies (Coins for cosmetics, Credits for crafting, and Crystals for extra rewards and perks) are all earned by playing the game and claiming them from daily missions, the Battle Pass, and the like
Tormented Soul
Your opponent wont have as much information as you have, and they tend to assume that youd put your artifacts in play as soon as you draw them, so if they only count seven poison damage via Ravager and Inkmoth and tap out assuming theyre safe, you can surprise them by going Darksteel Citadel, Springleaf Drum, Ornithopter to make it ten
There are 15 Autobots and Decepticons represented here, all appearing at Mythic rarity, so theres no reason to expect that Optimus Prime will be harder to get ahold of than say, Slicer (other than fan favoritism, of course)
Free sac outlets make for the best sac outlets
You earn Wildcards from opening packs, with a tracker showing you how many packs until you unlock your next one