A one red mana common Sorcery card from Ixalan that reads: "Rile deals 1 damage to target creature you control. That creature gains trample until end of turn. Draw a card." If any of your creatures have enrage as an ability then you need Rile in your deck. It pairs incredibly well with Polyraptor from Rivals of Ixalan. One damage likely won't be enough to hurt your enraged dino, and chances are your opponent doesn't want to trigger the enrage ability. So don't rely on them, when you can easily do it yourself. Besides, dinosaurs are cool.