By and large, people are now a little cold on treasure
Blood Tokens are artifacts that for one-generic mana, can be tapped and sacrificed to discard a card and then draw one back giving a madness opportunity and extra card advantage for one mana
At the beginning of your upkeep, you add two counters to Descent into Avernus, deal damage to all players, yourself included, equal to the number of counters on it, and everyone creates that many Treasure Tokens
They don't do this for larger UB products with lots of cards like MTG Warhammer 40k or MTG Doctor Who, however
It hits a lot of the early interaction and removal spells, but it doesnt hit the haymakers like Teferi, Hero of Dominaria or Jace, the Mind Sculptor, and is often a poor lategame topdeck
Perhaps the skull is none other than Mufasa's, as the card's title, "Scar - Finally King", might suggest