This little buddy doesn't have a terribly wide range of applications, but it doesn't have to be anything else but a great one-drop for Rakdos Aristocrats or Mardu Aggro lists that run Judith, the Scourge Diva and Tajic, Legion's End.
The Haste part is what sells this card, just like it was the case with Fanatical Firebrand. But it also has Lifelink, which signals the possible use of Ajani Pridemate in lists that also run Legion's Landing.
Of course, it's important to have this in the opening hand and let it accelerate your damage from the very beginning of the match-up. But if you happen to draw it later, make sure that it has some buffs added to it so it can be viable in later turns as well.