ModernUO/Projects/UOContent/Items/Weapons/Abilities/ShadowStrike.cs

namespace Server.Items
{
    /// <summary>
    ///     This powerful ability requires secondary skills to activate.
    ///     Successful use of Shadowstrike deals extra damage to the target and renders the attacker invisible!
    ///     Only those who are adept at the art of stealth will be able to use this ability.
    /// </summary>
    public class ShadowStrike : WeaponAbility
    {
        public override int BaseMana => 20;
        public override double DamageScalar => 1.25;

        public override bool RequiresTactics(Mobile from) => false;

        public override bool RequiresSecondarySkill(Mobile from) => true;
        public override double GetRequiredSecondarySkill(Mobile from) => 80;
        public override SkillName GetSecondarySkillName(Mobile from) => SkillName.Stealth;

        public override bool CheckSkills(Mobile from)
        {
            if (!base.CheckSkills(from))
            {
                return false;
            }

            var skill = from.Skills.Stealth;

            if (skill?.Value >= 80.0)
            {
                return true;
            }

            from.SendLocalizedMessage(1060183); // You lack the required stealth to perform that attack

            return false;
        }

        public override void OnHit(Mobile attacker, Mobile defender, int damage, WorldLocation worldLocation)
        {
            if (!Validate(attacker) || !CheckMana(attacker, true))
            {
                return;
            }

            ClearCurrentAbility(attacker);

            attacker.SendLocalizedMessage(1060078); // You strike and hide in the shadows!
            defender.SendLocalizedMessage(1060079); // You are dazed by the attack and your attacker vanishes!

            Effects.SendLocationParticles(
                EffectItem.Create(attacker.Location, attacker.Map, EffectItem.DefaultDuration),
                0x376A,
                8,
                12,
                9943
            );
            attacker.PlaySound(0x482);

            defender.FixedEffect(0x37BE, 20, 25);

            attacker.Combatant = null;
            attacker.Warmode = false;
            attacker.Hidden = true;
        }
    }
}