Curse of Years

Pick an enemy unit within 18" of the caster that is visible to them and roll 10 dice. For each roll of 6,
that unite suffers a mortal wound and you roll an
extra dice. For each roll of 5+ on these extra dice,
the target suffers another mortal wound and you
roll an extra dice. Now, for each roll of 4+, the
target suffers another mortal wound and you can
roll another dice. Keep rolling dice in this way, inflicting mortal wound and reducing the roll
needed to cause them by 1 each time, until eit