Rod of Flailing

Rod, legendary (requires attunement)

As a bonus action, you can change the rod from a normal-seeming rod to a magical two-headed flail or back. When you use the flail as a weapon, you gain a +3 bonus to attack and damage rolls. In addition, if you use an action to attack with the flail, you can use your bonus action to attack with the other head of the flail.

Three times per day, you can use a reaction to cast shield using the rod, whether it is in flail or rod form.