Like most Magic: The Gathering cards, the value of Cyclopean Mummy depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Masters Edition IV)
It also has a backup plan in its -3 ability, where it takes down a big threat while staying in the 2-loyalty range
Cyclonus, the Saboteur/Cybertronian Fighter (6/10) Galvatrons capable right-hand Decepticon is a rather strange one in the Magic world
It pushes lots of damage and creates a mana advantage, but it does so at a genuine cost that makes it incredibly well-balanced
Instead, the December 16 bannings and unbannings focused primarily on shifting around the Modern and Pioneer formats, while also touching on Explorer and Legacy with a few targeted bans as well
If we ever get a Magic set designed around musical subcultures, Rakdos could be nothing other than punk and hardcore