Feca Spell Rebound Is the Rebound spell that Feca's have only for PVP? Monsters don't use spells ( at least i think ) so it would work for that, but players do so is that the only reason for this spell?

Monsters only use spells.

The monster bambooto from pandala island use this specific spell.

in PVP, somebody would be stupid to attack you with a spell

in PVM, monsters dont use weapons, only spells, so they simply dont attack you at all, works out like a second immunity really

its work sometimes great in PvP especially when iop use strenghstorm, on himself.