The Omen is good at getting Flurry going, and the creature -- while not amazing, does come with Haste so it can often get in for damage before your opponent takes it down
I think that Niv-Mizzet, Parun is the best of the three because it manages to be a huge threat while also being a soft way to control what your opponents do
Eternalize only as a sorcery.) Plainscycling (, Discard this card: Search your library for a Plains card, reveal it, put it into your hand, then shuffle.) Eternalize (, Exile this card from your graveyard: Create a token that's a copy of it, except it's a 4/4 black Zombie Dragon with no mana cost
While you can just quest the card to gain two lore, Aladdin, Heroic Outlaws Daring Exploit ability allows you to not only gain two lore, but force your opponents to each lose two lore, whenever you banish a character on your turn using the card
Dragon's Rage Channeler is a 1/1 that allows you to surveil whenever you cast a noncreature spell
But unfortunately this deck doesn't have many utility lands - the best being Reliquary Tower, the others being the ' scry lands' and, I stretch calling them, utility lands
