Nah, it is too dangerous too use, it can start damaging your own troops, first two spirits are not too usefull sadly, only blob shield is good, damage spells has poor damage scale, wall is too much map (obstacles) depended but if you use lots of archers it may be worth a look. Last two spirits are more useful but are too late imo. Warrior really need talent like higher magic but for spirits with 120 rage i really would love to use them at least twice per turn
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