Vile Transference

Vile Transference is a spell that has a casting
value of 7.
If successfully cast, pick 1 enemy unit within 3"
of the caster that is visible to them.
Roll a number of dice equal to that enemy units
Wounds characteristic.
For each 6, that unit suffers 1 mortal wound and
you can heal 1 wound allocated to the caster.