Mayhap in Modern Horizons 2 Limited
It can trade with most dragons and will cause problems for any that have less than 5 power, while also hating on the graveyard -- or helping you trigger your own stuff
It costs one more mana than Heros Downfall but will take out 98% of the things that spell will while also giving you scry 2, which is close in power level to drawing a card
We both created White/Black decks out of only common cards for the event, and you could tell we were both going for the same idea
For just three mana, you can effectively Murder an opposing creature while drawing a card, gaining you both board control and card advantage
BPhillipYork: To me this seems like a pretty hilarious way to run something like an Eldrazi deck, "hop in we're going to warp reality." 4 Colorless and a crew 1 means you can get it out quickly and it will let you keep ramping until you have enough mana to bring out the huge Eldrazi titans, which seems like a fun, if not good, deck to build around