Arachnoid Wrath

In an instant, after receiving damage, several spider legs ( depending on the nº of spiders the user has ) are instantly conjured in the back of it´s user, striking the enemy all at once, unless if the enemy succeeds on the Dexterity saving throw against the user´s Spell Save DC and escaping that sudden reaction/attack, if he doesn ´t succeed, the enemy gets damaged by the number of spider legs ( each leg can deal 1d4 slashing or piercing damage, in this case, its piercing )

Once activated, the user can freely control his spider legs as if they were his arms or legs, giving him an advantage against the enemy ( this spell doesnt work unless if you are in an encounter )

Every spider leg can deal 1d4 piercing or slashing damage and the user can attack all of his spider legs in one action ( including the damage of your weapon, spell, etc. )

This reaction can only be used per day ( if you have two encounters in the same day, if you use this spell in the first encounter, you won´t be able to do it again in the next encounter, soo, only once per day ).