Meatloaf ring: Produces healing meaty treats; each use of the ring builds your love meter. When sufficient love is produced, the ring will generate almost any effect. However, it won't do that.
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.:~*♥A ring that summons like a thorn whip that runs around you like a wheel and shreds anyone in the way♥*~:.
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The Death Rain Ring: The avatar poses. The world shakes. Lightning flashes... and dark-colored rain pours onto all enemies in the vicinity, causing painful burning damage.
Lower levels would have a smaller radius and less awesome effects.
A Speed Attack ring. Whatever it is, it allows you to attack any monster on the screen without (visibly) moving from your position. The higher the level, the wider a radius you have to choose from.
An Eat Anything ring. Always active, it allows you to "eat" anything in your temporary inventory (if you have one) to regain HP. May also allow you to "eat" monsters you've just defeated.