TREMOR SHELLS

Use this Stratagem in your Shooting phase, when
selecting a target for a THUNDERFIRE
CANNON model from your army. Until the
end of the phase, each time that model makes
a ranged attack, subtract 1 from that attack's
wound roll, and, if a hit is scored against a target
that is not TITANIC and cannot FLY, then until
the start of your next Movement phase, halve
the Move characteristic of models in the target
unit and subtract 2 from Advance rolls and
charge rolls made for that unit.