cards like sneak attack mtg #145 Holo from Double Masters (2XM) Proxy That creature gains haste Sneak Attack | Eternal Masters

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

Each of the Power Nine cards is alone worth significant money - albeit not quite as much as their earlier Alpha and Beta set counterparts - with an Unlimited Black Lotus fetching up to $22,750 according to price tracking site MTGGoldfish

Dominaria United Jumpstart Boosters contain 20 Magic cards (including all the lands you need to play)

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

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 can't stack roles on the same creatures, so it encourages a sort of go-wide Voltron build, which sounds weird when you say it out loud