This ultimatum can obviously have easy combo potential with graveyard decks, especially with effects from cards like Entomb, but it works well in essentially any permanent-based deck
However if you go over the total mana value of 13, you lose the benefit of being able to cast all of those spells for free
Uria, Lord of Searing Flames, is a monster that has a similar effect as Slifer the Sky Dragon, with power increasing depending on the number of Continuous Traps in the graveyard
It's one of eight new cards with the rulebreaker mechanic, which technically existed on playtest cards prior to this release, and lets you mess with the typical deckbuilding restrictions for Commander
Currently, its unclear how widely distributed this Ultimate Green Goblin will be
Ofc there are more bandai sets than that and some sets may even lack info of full sets completely, like some bandai zukan sets