Groundshaker Shells

Use this Stratagem in your Shooting phase, when
selecting a target for an 'eavy lobba. Until the
end of the phase, each time that model makes a
ranged attack with an 'eavy lobba, 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
the result of Advance rolls and charge rolls made
for that unit.