The mechanic as a whole seems quite hard to deal with since its on an emblem and its operating in a zone thats difficult to interact with, just like with dungeons
Still, the long waits create a psychology thats built to make features like the Premium Pass sound like a good deal
If you truly wont be able to sleep at night because you dont own a Phyrexian Portal and it is bought out, you could settle for a played copy for your collection
Cards like Sword of Forge and Frontier, Ichormoon Gauntlet, and the sets Planeswalkers are all something you may want to have some answers for
There's some great new protection spells in this collection too, like Legolas' Quick Reflexes, which gives Split Second Hexproof, for the creature you really want to save, or Courageous Resolve which cantrips, and can come in clutch in the last turn or two of a game