Stalblind

Stalbind is the final boss of the Thieves' Hideout first appearing in A Link Between Worlds. He can only be reachable when the Thief Girl is returned to the entrance of the dungeon.

Strategy
When Link enters the room where Stalbind resides, the boss will rush against him with his sword and shield. Link must merge (become a drawing) into the shield so the boss may confuse and will try to find him in the room. In that moment, Link must merge behind his back and slash him with his sword.