Reduce magic damage temporarily
Shell is an indirect magic spell in Final Fantasy VIII. The spell halves magical damage that a character takes for a certain duration. It can also be junctioned to boost stats, especially Spirit, and to reduce damage from all elements.
Shell is the counterpart to Protect, which halves physical damage.
Shell can be cast using the Magic command or Selphie's Slot Limit Break. Casting Shell in battle boosts compatibility with Carbuncle by 1, and with Cerberus by 0.2, but lowers compatibility with Diablos and Eden by 0.2 as well.
Shell can also be junctioned to boost stats. It provides among the best stat boosts to Spirit, and more importantly, can provide resistance to all elements.