Changing summon timers

Im trying to make a map with fire elemental instead of water elemental, but i dont know how to change the summon timer (the blue bar that says "water elemental"). Is there a way of changing this?

Make a new custom buff that says Fire elemental instead of Water elemental. Then assign this buff to your summon spell. This is only possible with Buff editor in TFT 1.13 or higher.

Ive worked out how to do it for summon elemental now (by changing the units/humanabilitystrings.txt) but now i want to do the same thing with metamorphisis but for some reason changing the nighteflabilitystrings.txt doesnt work, can anyone help me with this?

If you have TFT, edit the Buff called "Water Elemental", and change the name to "Fire Elemental".

As for Metamorph, do the same thing. Change the "Metamorphosis" Buff name to anything else you want, and give the morphed unit that Buff.

how exactly do you give units buffs? i cant find a trigget action for it and there isnt a field for it when editing units

Ok, if you want to edit the buff properties, you do this...
In the W/E 1.13 or later, go to Object Editor. From there tick on the tab named 'buffs/effects' then u look in there until you find the buff you are after. In your case Water Elemental. Then look under the strings part. Look around and change the tooltip, which says Water Elemental. Now we want to make sure the ability ur using is using the correct buff. But if your using the same ability i.e. Water Elemental, it wont matter.