The combination of its +1 and -2 ability means that its hard to fight this card efficiently, and it gets better when you have graveyard synergies or discard incentives in play like Bandit's Talent
It doesn't trigger if you put Geological Appraiser onto the battlefield without casting it.
This means we get to use him as a strong attacker, either to threaten a Life card or KO an opponents rested Character
With Suspend, its eerily similar, as the card hit with Suspend cant be cast once the counters are all gone
Choosing Cards Its a good idea to start building your deck with cards you already own
As with most things in Magic, however, I encourage you to do your own research on Gatherer or Scryfall as well there are a lot of blue mass removal spells beyond those in this post, and while they will generally be the best options for many blue Commander decks, some metagames and strategies can allow you to benefit a lot from a niche effect or specialized variation