mtg core set 2019 card list Magic: The Gathering Booster Box MTG Booster Pack Draft :

Every card that exists on Arena and is legal in Pioneer is legal in Explorer, and nothing more than that

That said, Daybreak Product Manager Tony Mayer says the curation element can't be understated in terms of what has helped Cube flourish, at least when it comes to MTGOs Vintage Cube

Kolev has been careful to scrub any use of official Disney art or assets from Pixelborns digital interface

1 Collector Booster, 9 Play Boosters, 2 Traditional Foil Extended-Art cards, 32 Full-Art Land cards (16 foil, 16 nonfoil), 1 Spindown life counter, 1 special foil FINAL FANTASY card storage box, and 2 reference cards

Hellkite Tyrant is firmly in the latter camp