Last is the most played Impetus, the Red one
That may not seem very powerful, but Sanctum Weaver is often the reason you can play all the cards you draw
I expect to board Syncopate in and out a lot in this archetype, as its effectiveness should vary greatly by matchup
Its worth noting that this can trigger Up the Beanstalk even when cast for three, so it could see play alongside Rides End for that reason
The more interesting value will be using Archfiend of the Dross to do a lot of damage and then sacrificing it before the last oil counter is removed
You'll want to keep him as safe as possible with Bodyguards, Locations, and characters that grant him Ward or Evasive because if your opponent can't get rid of him quickly, you can run away with the game.