How works Necro Call?

[ArkhanTheBlack]

The point is that books will get attacked before they can cast anything. What's their initiative level?

That shouldn't be a problem. You can also summon them at the back to make sure that they can cast their spell. The biggest books have initiative 5 which isn't great but also not bad. You can also decide the point when you want to summon them.

But I don't think the books will survive against many army setup in impossible mode.

I think you need a very high INT to make them worthy in impossible mode.

It also depends on your other spells. My best damage spell is ice snake at the moment which causes about 3000 damage in total against 3 stacks for 20 mana + freeze effect. If the book casts lightning, the damage is usually about 5000 damage in total against 5+ enemies + shock effect for 30 mana. In addition I get a decent blocker and the chance for more spells. Therefore if the books are in a 'good mood', they can cause a lot more damage in a short time than my strongest damage spells. The only problem is to motivate them to cast this spell or at least a comparable one...
BTW, they are great against gremlin towers because they don't cast fear and weakness in this case.