Here is another installment of exTRAPaganza, our Thursday over-the-top trap series.
The approach to the castle is flat and clear for hundreds of yards with only thigh-high grass.
Hidden in the grass are several tripwires. Each of these tripwires causes hundreds of arrows to be launched from the castle to the tripwire spot. The tripwires are a hard perception check to see. If tripped, the targets within 60′ of the tripwire take extremely high damage, with a hard dexterity saving throw halving the damage.
The tripwires, if spotted, can be easily cut and disabled.