RTF is a global modification that replaces all towns in the game.

To avoid being unsubstantiated, I will explain with examples.
Regeneration => pain absorption. The essence: it's like a thirst for blood (which in Heroes 3 is fire), but with a different effect. Instead of increasing damage, it gradually absorbs it, putting the unit in a state close to berserk.
Phantom => flaming phantom. The essence: an unstable copy of a unit that can move and deal damage, but is relatively easily destroyed.
Blessing => righteous wrath (since there is no such skill anymore, as I understand it).
Confusion => sleep. The essence: using water and cold to make the enemy unit incapacitated.
Slow => slow. I don't see a problem here.
And so on.

Well, with this approach, you can come up with any association, but still, regeneration turning into fire :smile18: has a clear connection either with water or with earth - here, not only associations play a role, but also elementary logic and at least some laws of nature. Of course, fire is not only destruction, but also a hearth that warms and shelters from the cold, for example, but it all turned out too unconvincing. There are, of course, spells that can be placed in two ways - for example, holy word can be used as air (an association with the heavens, as in Heroes 3) or as fire, as a sacred flame that burns away all evil (let's remember the same religious views on flame). But still, a number of spells have a clear connection with an element, and pushing this same unfortunate regeneration into fire - no, I'm sorry...