The prevalence of Teferi in Modern means that most people do not run Veil of Summer as a 3 or 4-of anymore, which used to be the case about a year ago
3 Immerwolf Every Wolf's Best Friend Immerwolf is a staple of Wolf and Werewolf decks alike, though it's tailored specifically towards transforming Werewolves
[adinserter block=1] Now, a note on the actual top 10
Drivnod, Carnage Dominus Drivnod, Carnage Dominus is the least exciting Dominus to me, mainly because its just a carbon copy of Teysa Karlov
Both saw a great deal of play in tournament caliber decks in a variety of formats as long as they were legal, with both remaining absolute powerhouses in the Vintage format as well as serious threats in Extended, at least prior to the rotation of dual lands
It was the best deck in my meta when we first really started wanting to compete, though we were very unevolved