Top 10 (Colorless) Artifact Creatures The idea of continuously moving creatures from one pile to another and accruing value as you go is not a new one, but I must admit that I myself have never pursued Aristocrats with artifact creatures specifically
Even if you end up having your Heartfire Hero get destroyed in combat you can get one last push for damage by dealing damage to an opponent equal to Heartfire Heros power
Where this may fit in would be in an Emergent Ultimatum deck
The exact appearance can vary by print era, but many real cards show a recognizable internal layer
Charizard cards and older cards that dont have a drop-shadow behind the image of the Pokemon have become especially lucrative, some going for thousands of dollars
To make room for upgrades, consider cutting the chaff like Secret Rendezvous, Keen Duelist, and Tomik, Wielder of Law (a particularly odd inclusion in a deck with no Planeswalkers)