Oakshell is a spell given to priests of Fo at 35 faith. It temporarily increases the target's damage resistance, causing them to take less damage for a time. It can be cast on oneself, other players, or creatures.
- Activate a statuette of Fo
- Right-click on your body, another player, or a ceature
- Select Spells > Oakshell
From the July 15, 2011 update:
- Oakshell power now uses the rule of 70 algorithm and may glance
- If the power of an Oakshell is above 70 it will grow into a Thornshell and cause wounds like Aura of Shared Pain where you wear no armour. The effect name won't change yet though.
As of the February 15, 2012 update, armor while worn will make Oakshell inactive on that bodypart.