This will penetrate all Line Of Sight.

-Requires warmode on to use in the open world, can be used anywhere PVP talents are enabled.
-Requires "Lawbringer" pvp talent.

All you do is cast judgement on a mob in range, and target a further enemy before your judgement hits the original mob.
The first mob will get the yellow judgement debuff, second target will get the red debuff.
This happens due to the hidden talent spell being cast on the current target when judgement hits its target, instead of when judgment is originally cast.

Macro to cast 100yd range spell at your focus target:

/cast Judgment
/target focus

› See More: Paladin - 100yd LOS penetrating judgement