With a mana value that prohibitive, the cards effect better be game-breaking
Or you can just drop it turn one, sacrifice it on turn two a la Rampant Growth to grab a land if you have the need
Much like the other cards that make opponents mill half of their deck, Maddening Cacophonys best application is with Bruvac the Grandiloquent, who turns this into a game-winning combo
Its even got auto-generated landscape playmats based on color combinations, too
For a mere three mana, Svyelun is a 3/4 merfolk god that has indestructible as long as its owner controls two or more other merfolk
More experienced groups may prefer sets with deeper synergies, unusual mechanics, and more difficult build decisions