While it's not new, it can use some cards like Camellia, the Seedmiser to provide redundancy and other synergy options
With the Velocipede out, all your other creatures and vehicles come into play with an extra +1/+1 counter on it
Cards like Professor Sada's Vitality are among the best in the game, while most people see cards like Explorer's Guidance as too risky to play
That extra dimension of probability and gaining reads on people is something I like a lot about magic and I like having it in combat and prowess offers this nicely
Four mana for a creature that attacks as a 3/5 haste cant be bad
If the game stretches out, you might even be able to drop the Cordial Vampire and then burst-kill someone out of nowhere, thanks to how well it plays with Kalastria Highborn and Blood Artist when fueled by zero-mana sacrifice outlets such as Viscera Seer, Stromkirk Condemned, and Bloodthrone Vampire