how to do simple spell(type ability) that multiply actor health

[raiderrevenge2287]

hi everyone i hope this question is not boring you
can someone point me to the right direction
i just want to do
"a simble spell(type ability) that multtiply actor health"

if this custom spell i want to make required hard code script
can show me where to see For example

i have try search everything but look like i got lost
i dont know what the right word to search for

thank you very much if you help me out

if this question is boring you please just delete my post
i am sorry