[The wish granter isn’t used to magic, not like this, but they tried their very best. What started out in talks as an amulet actually ends up as a simple ring
. A mood ring to be exact. Once put on, it shrinks to fit Zatanna’s finger and when pulled off it retains the size. One size fits Zatanna, and all that.
The ring is a protection ring, but it won’t last forever. As the attacks on Zatanna happen, the ring is drained a little more each time, the color shifting
on the mood ring to show that the magic is being used. It starts at blue and will shift to the next color as magic is being used. When it’s completely drained it turns black and will slide off her finger immediately.
Small attacks take a small amount of magic, and the transition is slow. Bigger ones can shift the color more immediately into the next. An attack that would kill her near instantly (direct attack to the heart, decapitation, puncturing of lungs) will use up the rest of the ring’s power immediately, saving her life and the stone fading to black.]