Aggression is the name of the game when talking about Boros creatures
Artifact And Creature Sacrifice (White/Black) Orzhov (white/black) is the archetype that wants your own creatures to be sacrificed
If I recall there are four, the Piracy first, Reconnaissance Mission with cycling, the Bident above that can be tapped with two mana on an opposing turn to force them to attack and then the recently printed Vehicle called The Indomitable
However, while Ruric Thar is heavily dependent on the spells being cast by your opponents to be of specific types, Omnath's ability is based off of the cards that you cast, putting its triggers entirely within your control
Shes dead now, thanks to Karn, who has quite the history dealing with moms despite his status as a being who never had one (unless you count Urza, I guess)