This TARDIS had a previous operator who was an inveterate tinkerer, modifying systems left and right until the machine was so rewired that the average Gallifreyan technician would be at a total loss to put things back the way they were. This doesn’t make the TARDIS run any worse, in some cases the modifications might even be useful, but it makes repairing the thing a nightmare.

The whole system is linked together in such a bizarre fashion that there is a chance that any repair or modification will cause another system to fail. Unless the person making the repair or modification rolls a Good Success or better, the TARDIS will take another point of damage.

This Trait raises the TARDIS’ Story Points by 2.