uncommon transmutation 

Traditions arcane, primal

Cast [R] verbal; Trigger A shield within range would be reduced to 0 Hit Points by a damaging effect; Requirements The triggering shield had more than 1 Hit Point before taking damage.

Range 60 feet; Targets 1 shield

You hold a shield together with the power of your magic, forcing wood and steel to fuse back together. The shield remains at 1 Hit Point and isn't destroyed. Its construction is weakened until someone takes the time to repair it, preventing desperate repair or a similar ability from saving the same shield until your next daily preparations.

LOKL, page 92.