Part 1 - Courtyard with the dragon head. The first spawn is on some boxes next to a zombie window, to the right of the main entrance. The second spawn is on the side of a small staircase leading up to a zombie window, and this staircase is next to the one that wraps around the building. The final spawn is up the stairs leading to death ray and it will be on the flat ground.
Part 2 - Courtyard with the building that has stained glass and has a dragon head inside. The first spawn is leaned against some boxes next to a zombie window that is to the right of the stairs to the main entrance of the big building. The second spawn is opposite of the last spawn and it is on the barrels next to a staircase and a zombie window. The final spawn is in the tower with the broken staircase and it is on the bottom on the desks with the person and the computer.
Part 3 - Pyramid room. Turn on anti gravity by standing on the four tiles surrounding the pyramid. The first spawn is on the top of one of the four pillars that are surrounding the pyramid and you will have to wall run up to there. The second spawn is up above the Pack-a-punch parts which you will have to wall run to get. The final spawn is across the Pack-a-punch parts to the left above the door and you will have to wall run to get it.
Craft - You can craft the shield at the workbench to the right of the dragon head in the computer room with the stained glass or next to the wundersphere above double tap.