Elesh Norn, Mother of Machines is another option, but its stax effect is so aggressive itll draw an unbelievable amount of heat
That wedding does get violently interrupted, though, and it's all just a sham so that Yuna can attempt a magical dance that will send Seymour's soul to the afterlife (the plot of Final Fantasy X goes to some strange places)
Enigma Ridges Fun: 4 Impact: 3 Chaos: 2 Giving a Land Tax effect to everyone except whoever has the most lands is a pretty good leveling effect, although putting the lands into your hand rather than onto the battlefield tapped limits how immediately useful the effect is
Youll also need to make sure your casting costs are tracked because so many creatures have abilities activated by the X cost
Activated abilities contain a colon and appear in the form "[Cost]: [Effect]." Some keywords (such as equip) are activated abilities and will have colons in their reminder texts
Ace's powerful Devil Fruit: the Rogia Foco Foco