Three Becomes Four
Status
Summary
When Draco cornered Dumbledore on the Astronomy Tower he was offered a choice, to switch sides, what if he took it? His family safe, Draco is drafted into this war. With Dumbledore's last words urging Harry to work with his childhood enemy, he has no choice but to include him in their plans. How will the horcrux hunt go with Malfoy along for the ride? / 7th year diversion.