Create a massive reflective cube of enchanted ice 100ft in all dimensions; hostile spells rebound onto their casters for 1 minute. You and allies may walk through at will.
Casting this spell in the same place for a month makes it permanent.
A towering sphere of flawless ice forms, smooth as polished crystal. Reflected shapes distort across its curved surface. When a spell strikes, it bends—then rebounds with force, hurling the magic back toward its source.