Cast it normally and you'll get a diminutive but powerful Flying creature that allows you to draw cards equal to the number of opponents who took combat damage this turn (depending on how aggressive you are, this could be quite a lot)
In Commander this will most commonly start on chapter two, and I think thats a reasonable cost for those effects
Preboard against Chrysalis decks there are two outs: a fast clock plus Sewer-Velliance Cam, or KCS + Toxin
Like The Swarmlord, she grows creatures over time
Now, without any further ado, lets dive into this list of the best Infect cards in MTG for Commander
10 Gateway Sneak Uncommon - $2.40 Gates are a fun and surprisingly reliable deck archetype that pops up every few sets, generally around the time Magic visits the Ravnica plane