Blazing Shoal Blazing Shoal was a key ingredient in the first and most explosive version of Infect
Feast of Sanity Feast of Sanity doesn't look like much on its own, but in decks all about discarding cards -- Wheel and Madness -- it can be a powerful removal / finisher that keeps you alive while wiping everything out
3 Cycling Deserts Not Optimal, But Synergistic Cycling's an all-time great Magic mechanic
And given the release cadence, it can be hard to keep up
Stuff like Snuff Out or Dismember are already heavily played cards, but here, you get to draw a card from them because you lost 4 life, and you also get to drain your opponents for 2 life, offsetting your life loss
While this can provide some additional value, Jirina's most notable ability is the fact that this card provides all other Humans under your control with +2/+0