You touch a willing creature which can include yourself. Until the spell ends, the target’s skin has a rough, bark-like appearance. The target’s base AC is set to 16, and its AC can't be reduced below 16, regardless of what kind of armor it is wearing, or whatever effect would try to reduce it past this point. Targets affected by this spell have their movement speed reduced by 5 feet, and may add their Dextarity bonus to this armor, but not any other bonuses from their armor, other then shields.

While affected by this spell, the target may use a bonus action to either remove the above effects of this spell, or regain the above effects of this spell. This does not affect the duration of this spell.