LEGO Marvel's Avengers Guide Walkthrough (Handheld) Level 15
Thor (A: AoU) and Iron Man (M45)
Defeat the Ultron Sentries
Once again you have control of Thor. Defeat 15 Ultron Sentries, after which Iron Man joins the fray. Make sure to use the teamwork ability so Thor charges up Iron Man so you can complete this challenge. Then use his missiles to destroy the three silver objects near the ceiling.