Turn off arcade magic and cast these spells to enable the corresponding cheat:

• Big Head: Mega, Rhaa, Mega, Rhaa, Mega, Rhaa
• Fire Bow: Spacium, Aam, Mega, Spacium, Aam, Mega
• Level 0 character, no runes or skill points: Nhi, Nhi, Nhi, Nhi, Nhi, Vitae
• Level 10 character with 30 stat points and 200 skill points: Mega, Mega, Mega, Mega, Mega, Vitae
• Power Sword: Mega, Aam, Rhaa, Rhaa, Rhaa, Rhaa
• Show Map: Nhi, Rhaa, Aam, Nhi, Rhaa, Aam
• Summon Strong Warrior: Mega, Mega, Mega, Aam, Vitae, Tera
• Infinite Hit Points: Mega, Mega, Mega, Mega, Mega, Kaom
• Wall Collisions Disabled: Mega, Tera, Mega, Tera

Use the Bless spell and you can equip the heaviest of armors (like the Ylside Plate) without having the minimum strength needed.

The kicker is when the spell's effects end, you can still have that armor equipped, even though you cannot wear it initially! Just remember not to take it off.