The Barricade serves as the Inventor’s shield. The Inventor often moves towards the action, but with only 10 life and no inherent defenses, it relies on other units for protection. The Barricade allows the Inventor to advance, attack, and immediately build a defensive structure.
This is especially valuable during an opponent’s counterattack. After removing an enemy unit, covering that spot with a Barricade provides crucial defense - an established powerful tactic in Summoner Wars. However, since the Barricade cannot move, ensure it doesn’t obstruct the Inventor's path on the following turn.