The developers of MTG Arena said they decided against a disenchant system because it created feel-bad moments when people disenchanted cards they needed later
Heggen reassures me that they are thoughtful about what new Secret Lair cards are doing to strategies outside of Commander, saying we're not trying to accidentally ruin those formats by casually printing hyper-powerful cards into them. That said, the concept of mechanically unique Secret Lair cards existing at all has been a hot topic in the community regardless of power level
SV03: Obsidian Flames
They have appeared as MTGO promos, in two Commander expansions, and as foil versions for the Standard Showdown and Treasure Chest booster packs
Zangoose While it crumbles against fighting types, this is effectively a better Druddigon, able to attack and retreat much more easily
7 Dratini - Genetic Apex A Basic Pokemon With Big Dreams At 70 HP, Dratini can withstand a hit or two from some of the stronger Basic Pokemon that are commonly found in decks, though you will quickly want to evolve it to Dragonair to keep it safe