Recipe:
Entirely a Mark II Iron Man movie figure

Few of my customs have a unique backstory but this one is different. The concept behind this is, in light of the Secret Invasion, Iron Man decides to take a more proactive role in investigating reports of alien activity on Earth and heads to Mission City where reports of giant alien robots fighting in the streets came in. Scanning the scene, he discovers microscopic particles of the Allspark which integrate themselves into his armor and upgrade his detection and weapons systems so that he can now detect and discern individual Transformer energy signatures as well has pose a threat to any hostile Transformers he might come across.