Atrophy

Atrophy is the most powerful strength-reducing curse spells in RuneScape. Although it needs level 87 Magic to be casted, it can reduce the opponent's Strength level by 25% then being hurt by 15%. However it needs to finish the Alphans' Quest. Tome of frost with an earth staff, mud battlestaff/Mystic mud staff will not work. Doing so will get the message "You don't have -- runes to cast this spell".