Ranger Trap: Infection

Prerequisite: 13th-level ranger; magical

When you create this trap, choose one of the diseases from the contagion spell. When activated, pustulant boils grow and erupt on surfaces in a 20-foot-radius sphere centered on the trap. Each creature in the area must make a Constitution saving throw. On a failure, a creature is affected as if hit by the attack in the contagion spell (using the disease you chose).