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
Perhaps the skull is none other than Mufasa's, as the card's title, "Scar - Finally King", might suggest
That damage can then be upped via Grab Your Sword or just using Tinker Bell to attack and spread damage via her Puny Pirate ability, assuming shes been shifted via Morph
This deck is much more of a tempo-oriented deck as opposed to most of the other controlling ramp builds
I dont think she will drop much or actually drop at all, as her price seems to be growing slowly since late January
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