May empower your Steel Defender, whenever you use your bonus action to command your Steel Defender it may take two actions instead of one. Additionally, when you or your Steel Defender takes damage, the target of the damage can use its reaction to transfer the damage to the other.

(If studied, it can be used in several applications. Many skilled artificers used similar cores to boost or power their creations. (your imagination is the limit, at your DMs discretion))

Notes: Artificer