Maestros Ascendancy functions a lot like Kess, Dissident Mage, allowing you to cast an instant or sorcery from your graveyard on each of your turns
Your spells from exile and graveyard are reduced by two as well as plotting
Called to her side, they walloped the assassins, driving them away to the cheers of the bystanders
While resolving Kefka, Court Mage's last ability, the next opponent in turn order chooses a permanent they control, then each other opponent in turn order does the same
Not to mention it's easier to cast than Murder
Like so many other recurring mechanics without an official name, this has been named after the first card where it appeared, Card not found