Zoro, Kid, Doflamingo, or Kaido
For decks full of one or two drops, this card can be a nightmare for which they will happily trade multiple cards, as the Keg amounts to a two mana one-sided Wrath of God or sometimes even worse by killing artifacts like Cursed Scroll, Winter Orb or Ankh of Mishra
Perhaps more important is his ability to Ward , which prevents opponents from targeting him without first sacrificing legendary artifacts or creatures
Vodalian Wave-Knight Vodalian Wave-Knight does double-duty as a lord for both knight decks and merfolk decks
That also makes Deathrite Shaman a dual-color Golgari card with a color identity since it has both and in its casting cost (on top of also having those mana symbols in its rules text)
Its kind of boring in how consistent it is