Overgrowth Removal Spells

I've noted Hyperscouring Flame in a few posts as this set's version of Shock, though it only hits creatures. That was one of the first red spells I iterated. So here's some more burn and removal spells I've been working on:

There's not a lot of "to the face" red burn options as yet. There's going to be some interesting tension with burn spells and the existence of the mutate mechanic. Any mutate creature targeted with a damage spell will get the +1/+1 counter before the spell revolves, meaning players will have to keep that in mind. They'll even get the +1/+1 even if the spell targeting it gets countered!

This one's intended for use against token creature-heavy decks (green/white/black). Though the nature of fecund means this isn't necessarily a board clear--many will have toughness higher than one. This may end up being a fairly weak card.

The rare red board clear for the set. There's also a rare red ogre with a reave enter-the-battlefield effect that does X damage to all non-flying creatures.

White is the anti-mutate color, so doing more damage to a creature with counters on it seems appropriate.

The Ashen Pox is the name of the disease (there are many plagues and diseases being unwittingly hosted by the various races) that's zombifying folks. Making a modal kill spell looks a little weird. But given the existence of reave in the set, I wanted it to be an option. I'm wondering if this is too expensive. I may cut it down to 2B.

Note that if you target a creature you control with mutate, it will get an extra counter.