You think them the easy target. That is your final mistake.
Level 3
Take My Shadow! .
When you roll Initiative: Choose 1 ally. Your shadow occupies their space.
• The shadow is invulnerable and moves with the ally.
Don't Touch My Friend! .
Reaction (when an enemy moves adjacent to your shadow’s owner): Make an Opportunity Attack against that enemy.
• On a hit: The target is Slowed until the end of its next turn.
Level 7
My Shadow Protects You! .
(INT times/Encounter) Reaction (when your shadow’s owner is hit by an attack): Your shadow Interpose. The shadow owner takes no damage.
Level 11
Shadow's Veil .
Enemies adjacent to your shadow’s owner have disadvantage on attack rolls targeting them.
Don't Touch My Friend! (2) .
You now ignore disadvantage on this Opportunity Attack.
Level 15
Dual Tactician .
When you spend a Combat Die to use a Combat Tactic on your attack, your shadow's owner gains that tactic's effect.
• They can apply it to their next weapon attack before the end of him next turn.
• They do not add bonus damage from your Combat Die.