Just like Fenrir, Sarulf grows to immense proportions as opponents' permanents leave the battlefield, giving you the option to remove them and keep the board clear
If you don't put the card into your hand, you may put it into your graveyard
They also result in a delayed trigger that does the killing, which you can avoid with stifles or end-the-turn cards like Sundial of the Infinite
They are too much in the aggressive area, the other aggressive looking cards you might play are for tempo defense or value
Draw and Mill strategies love this card, Niv-Mizzet, the Firemind and Laboratory Maniac especially
Strixhaven is going to be an outlier for most things, because of the way that they set up the Mystical Archive