Trigger 1
e - unit casts
c - your spell
a -
Set custom value of target to 2
Trigger 2
e -unit dies
c - custom value of triggering = 2
a -
whatever actions
Trigger 1
e - unit casts
c - your spell
a -
[B]ifthenelse[/B]
[B]if[/B] hp of target < or = [spell's damage]
[B]then [/B]
damage target 13371337
do whatever actions to target
[B]else[/B][B]
[/B]damage target [spell's damage]