Magrazam and the Pyre Hermits

When Guthreham's wild growth started getting out of hand, many wizards that had been serving the Arbor (and many of which had fought in the wars) started using their magics to try to get things in hand.

Some mages with more controlling magics were embraced by Janell and the Arbor as a way of trying to keep things in check without suppressing the growth that Janell and her followers embraced. But pyromancers and other wizards with harsher, destructive magics found themselves on the outs. It was a clash of wills that threatened to turn violent. But Magrazam, an elder mage who once fought by Janell's side, could sense that Janell was much more powerful than others understood. He doesn't know what a planeswalker is, but he knows that there's a lot more to Janell than meets the eye.

So instead he and his fellow wizards threw up their hands and left, heading up to the Nightscrape Mountains and essentially became hermits and live on their own terms.

Then the plagues came and started infecting people, killing them and often zombifying them. Many of the infected were pushed off to the coast or into the ruins of the overgrown cities Guthreham has abandoned. But others wanted to be free of this brutal, unending life cycle entirely. Some diseased folks or families with dying members have taken a difficult trek up to the Nightscrape Mountains. They seek release in the flames. They want the pyre hermits to burn them into dust, freeing them from all the pestilence.

At first, the pyre mages would only burn corpses and fully zombified people. But increasingly they've agreed to essentially euthanize those who have reached the end stage of disease. Magrazam is increasingly concerned that they cannot remain on the sidelines of all this. He's also aware, thanks to the natural cavern networks delving deep into the mountains, that there are independently operating artifacts and artificial creatures in the bowels of the plane. He doesn't know how they got there or what they're for. He has no idea about Guthreham's secret, but he does suspect Janell is hiding something significant.

This is an example of the common land cycle. Each will have a second cheapish on-color ability that essentially "exerts" the land.

Edit: No, this needs to damage an opponent, not a creature. Too powerful at common. Silly me.