Transmute Idaho

This spell channels power from the otherworldly plane of Idaho into an area around the caster, warping the terrain to resemble the hellish fields of the spells origin. There are two possible uses for the spell, granting either immediate or long-term benefits.

If you cast this spell using 1 action, you plant the Kernel of Corn at your feet. All normal plants in a 100-foot radius centered on that point wither and decay instantaneously to make space for a massive field of Corn to appear around the caster . A creature moving through the area must spend 4 feet of movement for every 1 foot it moves, its vision is reduced to 5 feet (Except tremor sense) and the corn magically grows higher to an unlimited height if someone within the boundaries of the cornfield tries to peer over the top.

You can exclude one or more areas of any size within the spell's area from being affected.

If you cast this spell over 8 hours, you curse the land, suffusing it with Idaho's invasive, leeching spirit. the spell functions as normal, but the field grows one foot in diameter every day, killing all other plant life in its path. The only method of destruction is through burning the fields and salting the land to ensure they do not return.