Surrak and Goreclaw Though there are cheaper ways to give your creatures +1/+1 counters when they enter (Good-Fortune Unicorn comes to mind), Surrak and Goreclaw distinguishes itself by giving them haste
An opponent or player outside the game chooses a nonland card with their favorite art
The first is a triggered ability: "When this permanent enters, target player may search their library for a card named [name], reveal it, put it into their hand, then shuffle." Note that the target player searches their library (which may be affected by effects such as that of Stranglehold) and that the card they find is revealed, even though these words aren't included in the ability's reminder text
Rampage 3 gives your commander +3/+3 for each creature blocking it beyond the first blocker
Capone Gang Bege, Alternate Art Rare, OP04-100 ($28) The Worst Generation are 12 pirates who tend to crop up a lot in lists of the most valuable One Piece cards and heres another
Overall, I think that Commander Masters has a lot to offer, even though I have my own personal nitpicks with some of the card choices and the accessibility of the product