This is a powerful effect in and of itself, but having access to it makes you a more flexible player
That could be by killing off my opponents, sure But its also fantastic with ways that let you sacrifice your own creatures, or even effects that put cards from the top of libraries into graveyards." Possible combos : "To potentially do a huge boost of damage, consider pairing this with cards that put a ton of cards from a library into a graveyard!" Where the design process began: "Every color in Eldraine has its own royal court of knights
Three mana is far too much for an effect like this
Tribal/Kindred is a weird type
Finally, weve got Craterhoof Behemoth, which is a classic finisher in Green, and Blightsteel Colossus, which is an 11/11 that has Trample, Infect and Indestructible
Generally, there is the primary Cube, the worth-the-Limited-splash-big-stuff Chromatic Cube and a supplemental combo-based one, the Tinkerer's Cube. MTG Online (MTGA's much-maligned step-sibling) has Cube on the regular if you find that you really love Cube