Quote Originally Posted by ivanpei View Post
Punishing fires is a strong card in decks that need the extra gas or reach. Also it is extremely mana intensive and strains the manabase. Jund fits the grove colours but the main colour of this deck is black so grove has to eat some wasteland slots. A grinding mirror oriented jund may benefit from fires/grove but in general, it is too easily disrupted and puts too much of a strain on the manabase /manacurve (too many 2 drops in this deck) to be optimal.

That's my 2 cents.
Agreed, it's more a question of whether or not you want to play with Grove of the Burnwillows and Thoughtseize/Inquisition of Kozilek or Wasteland and Hymn to Tourach, the Punishing Fires slot may as well be Chain Lightning for all it matters - Umezawa's Jitte is the card you want against aggro anyway.