Archmages Charm is extremely pushed, a solid permission spell, a good way to build card advantage for hitting land drops, and a fantastic tool against Deaths Shadow, Wild Nacatl, Goblin Guide, Pyxis of Pandemonium, Champion of the Parish, Aether Vial, Delver of Secrets, Hardened Scales, Amulet of Vigor, Benthic Biomancer, Glistener Elf, Noble Hierarch, Viscera Seer, and sometimes even Hexdrinker (just to mention a few)
In practice, there arent too many dedicated payoffs though
Secret Lair x Monster Hunter: The Hunters Grand Abolisher, featuring Tigrex Armor with Bone Scythes from Monster Hunter Generations and Monster Hunter Freedom 2
After reading this post, you should have a slightly better understanding of which dimensions of a playing card are the best for you
Along with a symbol on these special dice triggering a planeswalk, there's also a chaos side of the die which causes a wild effect