First time posting here, i hope it works.


Now, I have not played Warwind so far, and only came to the main menu, so my advice comes from comparisations to other RTS i have played.

1 To clarify, you are playing a campaign? Are all the units unlocked at start? I dont mean researchable, but overall? Campaigns often have this trick, where you only unlock all the arsenal of your faction over several missions, so it takes a while to unlock all kinds of units, spells, researches and buildings.

In this case, I suggest you try a skirmish, a no-campaign game with that faction, if that is a mode in this game. Check out what you can do there, it should be less stress on you, than in a life combat mission. Do druids and arch druids have spells then? Is there some lorewise relation to terrain or feats the player can do to unlock special things? Kill x units, occupy x areas (shrines/sacred grooves)? If you do not see a spell ability on your units, do they perhaps have a passive ability? Heal in certain terrain, heal others passivly by being near them? Try with a wounded units standing near, because the unit is called a Druid. That might be a possibilty, knowing how druids are often portrayed.

If you happen to unlock the research, safe the game. Check the last safe before that point, and ponder what changed.
Does the lore say anything on this topic? Perhaps if you try another campaign, which happesn to fight against the Eaggra, was the name? Fight those guys, and see what their so called druids do. If they use it, that may give you a idea.

2 A research that buffs a higher tier unit, does not apply to a lower tier unit? That is a thing i saw a lot in other games, there are some general upgrades that affect most units, and then there are specialist upgrades, that affect only a tree of units, or a singular type of unit.

3 Cant build grenadiers. Campaign again? How late tier are those? Has a different mission those grenadiers unlocked?
In either case, when the manual, which was made long ago, says something, it can be wrong/changed later in deveolpment of the game. Such things can happen. However, you said you cant build cruisers? Are those ships? For water? Does the map have water?

4 Should you face superior foes, check your options. Cowering and building up forces for a large push, to perhaps extend that ... offensive wall as you put it, is a valid option. Depending on the situation, it can be very successful. So, AI can cast are you before you can cast on it? That is a issue in old games like warcraft 2 for example, as well. Since you said you struggle with mouse speed, check if you can turn down the overall GAMESPEED, to even out the field against the AI. Check who has the furthest sight range on your units, and use that to spot an approaching enemy caster. Have sacrifical units stand around, so they possibly waste their mana on killing those, before your counter units then try and strike them down in turn. If the enemy spell is aoe, check if you can lure the spell to be cast in an area, where it has less impact on your units. Like, on the side of a battlefield, and not in a chokepoint wherey ou have to go through. Sounds hard, but perhaps you can make it work. As for spells, if you know any list that shows all these kinds of spells/abilities, please do share it with us here on the forum. Perhaps cut off, since links are not allowed and that.

As a ending thought on natures call, it could be that it summons plants? Forests? Perhaps wild animals that serve the caster? Does it increase your food count, if that is a thing in the game? Buff farming buildings? Does it place a ward that provides vision? Perhaps even a speed buff to units it is cast on? I am guessing in the dark, as you can tell.
As a final point, Natures call can be many things, in games. In real life, it is a figure of speech to say that one has to go to the toilet.

Good luck.

say, have you also checked the Manual (17mb) included, it does show the spell the Eaggra should be able to have. Do the spells appear, then?