ARCANE GENETIC ALCHEMY

-When a CUSTODES unit from your army
is chosen as the target of an attack. Until the end
of the phase, each time an attack is made against
that unit, your opponent cannot re-roll the hit roll,
wound roll or damage roll for that attack. If that
CUSTODES unit contains 4 or fewer models,
this Stratagem costs 1CP; otherwise, it costs 2CP.