Fear said that "this creature cannot be blocked except by artifact creatures and/or black creatures." It was flavourful, in the same way as Terror, but the game play was pretty awful
When the last is removed, sacrifice it.) Whenever a player casts their second spell each turn, proliferate
(It's an artifact with ", Sacrifice this token: Add one mana of any color.") Legendary Creature - Dragon God-Eternal Bontu Menace When God-Eternal Bontu enters, sacrifice any number of other permanents, then draw that many cards
Final Showdown while not the best main deck card, is a great sideboard staple
I dont want to copy and paste all the cheap mana-fixing artifacts that are out there from the Celestial Prism entry, so instead Ill just name the best generic one Chromatic Lantern
While Subterranean Tremors wouldnt necessarily be the best sweeper in Modern, it is totally passable as part of a plan with faster interaction taking care of the first threat or two