Gas Bombardment

Once per battle STRATEGIC GAMBIT. Place your Gas marker in the killzone; it cannot be placed underneath Vantage terrain. Whenever an operative is within 3" of that marker, subtract 1 from its APL stat. In the Ready step of the next Strategy phase, remove that marker. Note that an operative’s APL stat is only changed while it’s within 3" of that marker. If it moves more than 3" from that marker, its APL stat is no longer changed by this rule.