Keeping it around a while will be easier than with other planeswalkers
It reads as very anti-social, and ironically works better as a creature in dedicated reanimator builds than it ever will as a commander, where the element of surprise is lost, and your friends will be grumpy as soon as you sit down
The repeated destruction of enemy permanents is an easy trade-off for discarding cards, while it handles combat efficiently and is hard to kill
Besides, Hammer was great as a tool for when creatures were no longer working
It seems that, while there are not a great number in existence, their numbers remain fixed due to one's power transferring to an eligible human before death
P/T Number 30 Language English Legal Formats Commander, Historic, Legacy, Modern, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Pauper, Pioneer, Standard, Timeless Rulings (3/19/2021) If for some reason you can't win the game (because your opponent has cast Angel's Grace this turn, for example), you won't lose for having tried to draw a card from a library with no cards in it