Clue #6 - Watch Luke's Video:

Only once - never, ever again

Clue #1:

The "Uncommon" summer

Clue #2:

5 days straight - Only 500 allowed

Clue #3:

The ******* Blueprint

Clue #4:

An Ancient Blood Oath

Clue #5:

Warning:  Make sure you catch all of Luke's e-mails for the next little while - missing them could be hazardous to your sanity.