Thanks for the help. I got it to work using this:

Quote
IF
CharacterReceivedDamage(CHARACTERGUID_Grand_Father_Dick_31f20125-f047-4a8a-8b86-b9b2b9a67264)
AND
CharacterGetHitpointsPercentage(CHARACTERGUID_Grand_Father_Dick_31f20125-f047-4a8a-8b86-b9b2b9a67264,_Hp)
AND
_Hp < 90
THEN
DisplayText(CHARACTERGUID_Grand_Father_Dick_31f20125-f047-4a8a-8b86-b9b2b9a67264, "Less than 90% health");