It's the tooltip of Unstoppable Hunger. At the CampaignAbilityStrings its code is A06D. Every level of skill shows how much it heals (skill level A shows 400 x A), but I changed that to 100 x level of the skill in the jass. The tooltip of every skill level seems to be coded separately.
Edit: I had not changed anything in this file yet, so the jass and tooltips are untouched there.
Edit2:I found the files XD. The tooltip was partly on CampaignAbilityStrings and partly on war3map.w3a
Still, thx a lot for the quick reply and help with the n00b questions I asked today.
http://invalid.link/file/gHOAZBcI/De ... d_Map.html