That risk can be reduced by exiling cards from their library instead of putting the cards into their graveyards, or with graveyard hate
The battlements do not break
8 Split Up A New Spin On The Sweepers Of Old Four mana is where sweepers tend to be costed - anything less would be obscene and anything more tends to be a little slow (though in the latter case, with the right additional effects, it can still work)
One strong one uses Lurrus of the Dream-Den, Phyrexian Altar, and Kaya's Ghostform to sacrifice and recur Lurrus infinitely for infinite death, ETB, and cast triggers
This card features one of Disneys most iconic moments, with Maleficent in her monstrous dragon form
Note that fair decks can have draws where they just need a general non-specific type of card off a cantrip