Of course, the only real way to deal with Progenitus is with a board wipe of some kind, but, even then, if it goes into the graveyard you just shuffle it back into your deck
If a card or token would be put into your graveyard from anywhere, exile it instead
There are 100 each of the serialized borderless poster cards (0.1%) numbered XXX/100
Kastral, the Windcrested is the primary way to get Birds back from the graveyard
What I find most engaging to new players is the potential to cast the powerful spells they see depicted or summon the fantastical beasts that they couldnt otherwise imagine
If youre interested in taking a deeper look at the mechanics of the game, why not check out our guide to Lorcana Ink Types, or the difference between characters who are Storyborn, Dreamborn or Floodborn in Disney Lorcana?