4 retreat cost makes it clunky and susceptible to being trapped in the Active
Consider that Murderous Cut cannot prevent a creature like Siege Rhino from triggering its ability when it enters the battlefield, it cannot kill a Planeswalker, and it cannot stop an instant or sorcery
After all, these packs can be purchased in the hope that you will receive something rare or helpful, much like loot boxes in video games
That being said, all the best red token generators can be roughly grouped into: Those that create Treasures, Those that create a copy of a creature you control, usually exiling or sacrificing it at the end of combat or end of turn, Those that spawn 1/1 creature tokens, Those that create some really big dragons
If you run Shark Typhoon, this gets even better