cards like sneak attack mtg #145 Holo from Double Masters (2XM) Proxy Sacrifice the creature at the beginning of the next end step. Similar cards to Sneak Attack

6 The Fantastic Four Mister Fantastic, Invisible Woman, Human Torch, Or The Thing I can happily admit when I don't like a deck, and this is the case with the Fantastic Four precon, but I have to acknowledge that it's a really great precon that is super fun to play and never feels imbalanced or jarring regardless of which Commander you choose

Tracker is just a powerful card you play for that reason, it is not something you overly need in the deck

Each of those (Golem, token, power 3) are solid subthemes to leverage for additional, unique advantages

For cards to make an impact, they will either need to bring something new to the table or just be an all-around powerful card

You could just use this as a sac outlet that nets Treasures, but my mind goes immediately to Gravecrawler and any third combo piece you can think of