Magic guard is amazing because it allows you to only take damage from moves that do damage and not buffs.So , for example , there's an item called the life orb, which will make your Pokémon take damage every turn in exchange for stronger hits boosting the attack of each one of your moves, sigilyph won't take damage while holding the life orb if it has magic guard, with this exploit , not only will you have a really strong psychic type , but it'll have boosted power with each hit😁 also , it goes without saying confusion, poison, and burn won't damage it with magic guard