This is just a little Christmas idea that popped into my head. It can be considered as a prequel to a new story that I have started on. A/G all the way.

Tony is a genius, and everyone knows it - including Tony himself. And sometimes Tony is a little shit about it. But Steve is the only one who knows how to destroy every intelligent thought that said genius has.

After S3. Arthur is finding it hard to be 'Temporary King', and Morgana has sworn vengeance against Merlin for destroying the immortal army, so soon Merlin and Arthur find themselves fighting against Morgana and her new ally, a Fallen Angel. No slash.