Wearing armor limits a caster's Ability to perform precise and routine gestures necessary for spellcasting, especially in the Arcane and Primal Sphere of Magic.

However, this limitation does not apply to the Divine Sphere of Magic, which power is drawn from the outer Planes or other higher beings.

When Casting a Spell while wearing armor, and the spell requires a Somatic Spell Component (hand gestures and movements), or Material Spell Component (requires a free hand to grab and manipulate the material spell component) an Armor Bending Roll is required, with a fixed DC of 5 + Armor's AC vs. the Armor Skill Roll of that respective Armor Type.

It should be noted that using magical objects to cast a spell, such as a scroll, to does NOT require a Armor Bending Roll.

→ If the roll is below the DC, the Spell fails to cast.
→ On a tie, the Spell succeeds, but a roll on the Wild Magic Surge Table is also made.
→ If the roll exceeds the DC, the Spell succeeds as intended.

Investing Skill Points in the Armor Skill not only grants benefits specific to that armor classification but also improves the caster's success in Casting Spells.