Leaden

After resolving an attack using a weapon with the
Gas trait with this Gaseous Ammo applied, place
a 3" Blast marker so that its central hole is within
the area of the Flame template or Blast marker
placed when making the attack. Any fighters that
move through this Blast marker count as being
hit by the weapon that made this attack (work
out this hit when the fighter ends their current
action). This Blast marker remains in play until
the End phase of the current round.