Four mana is steep for Ill-Tempered Loner / Howlpack Avenger, but once this fierce werewolf starts scrapping in combat, that extra damage can make it worthwhile
Meanwhile, OTJ had a strong focus on legendary creatures, with all of the Limited formats signpost uncommons being legendaries
Those are the kind of people you want to do business with
Annihinfect (Whenever this creature attacks, defending player sacrifices a permanent for each poison counter they have.) Kozilek's first ability will resolve before Kozilek does
Retriever Phoenix is another possibility, although I found those builds could run out of gas quickly
Combining this with something like Birgi, God of Storytelling can keep your mana topped up to keep the party going