I have made a shiva spell that uses healing ward as its base. However, when you click on shiva then it says "healing ward". Is there any way to change this to either "summoned unit" or "shiva"?
On the blue bar you mean? Which shows you how much time the summoned has left? That's easy... Go to the buffs in Object Editor and copy-paste the buff of the Healing Ward. Give the copy the name you want to appear on the Blue Bar. Then give this buff to your spell. That is all if that's the problem...