Circle of Steel

Druid that can turn to metal and fightstuff.

Mechanical Mimicry

The rites of your circle grant you the ability to turn your body into metal entering Steel Form. As an action or bonus action you can expend a use of Wildshape to turn yourself to metal providing the following benefits for an amount of time equal to half your druid level:

• You add the proficiency bonus associated with your druid level to your armor class. 
• Your max hp and current hp increase by your druid level.

If you use mechanical mimicry while in a Wildshape form you reset the duration of your wildshape.

Combat Steel Form

When you choose this circle at 2nd level, you gain the ability to use Wild Shape on your turn as a bonus action, rather than as an action.

Additionally, while you are transformed by Wild Shape or Steel Form, you can use a bonus action to expend one spell slot to gain 5 Temp hit points per level of the spell slot expended.

Precise Reflex

Starting at 6th level, while in Steel Form but not Wildshape, you gain the Extra Attack feature meaning you may make two attacks instead of one when you take the Attack action. While in both Wild Shape and Steel Form you may make an extra attack as your animal form from any selection that the stat block of your animal provides. Additionally you can make 2 extra attack when in both forms at level 11 and 3 extra attacks at level 17 while in both forms. 

Adamantine Soul

Starting at 6th level your attacks while in both Steel and Wildshape form are magical for the sake of overcoming resistances.

Quickened Assembly

At 10th level, you can use an action or bonus action to activate both your Wild Shape and Steel form at the same time at the cost of only one Wildshape usage.

Statuesque

By 14th level, you have learned how nature and society interact in new and innovative ways. You gain the following benefits while in steel form:

• While you are not moving, you are indistinguishable from a mannequin, statue or disabled construct.
• You have advantage on checks to maintain concentration.
• Reduce all bludgeoning, piercing and slashing damage you take by your proficiency bonus.