Human black tower

The black tower is a building that has the purpose to teaching your heroes new spells. the cost and times required to for each level of the building are as follows:

1:

2:

3:

4:

5:

6:

7:

8:

9:

10:

11:

12:

13:

14:

15:

16;

17;

18;

19;

20:

These are all the spells that your heroes can learn

Fiery blast

http://hero-civilization.wikia.com/wiki/Fiery_blast

spell ball

http://hero-civilization.wikia.com/wiki/Spell_ball

Ice bolt

http://hero-civilization.wikia.com/wiki/Ice_bolt

Thunderbolt

http://hero-civilization.wikia.com/wiki/Thunderbolt

Lightning strike

http://hero-civilization.wikia.com/wiki/Lightning_strike

twisted twister

http://hero-civilization.wikia.com/wiki/Twisted_twister

Earthquake

http://hero-civilization.wikia.com/wiki/Earthquake

Skysweeper

http://hero-civilization.wikia.com/wiki/Sky_sweeper

Meteor shower

http://hero-civilization.wikia.com/wiki/Meteor_shower

ice bows

http://hero-civilization.wikia.com/wiki/Ice_bows

stalagmite strike

http://hero-civilization.wikia.com/wiki/Stalagmite_strike

fiery swords

http://hero-civilization.wikia.com/wiki/Feiry_swords

blessing of the flame

http://hero-civilization.wikia.com/wiki/Blessings_of_the_flame

ice blessing

http://hero-civilization.wikia.com/wiki/Ice_blessing

rolling thunder

http://hero-civilization.wikia.com/wiki/Rolling_thunder

blessed earth

http://hero-civilization.wikia.com/wiki/Blessed_earth

chasm

http://hero-civilization.wikia.com/wiki/Chasm

Fire shield

http://hero-civilization.wikia.com/wiki/Fire_shield

weaken

http://hero-civilization.wikia.com/wiki/Weaken

cripple

http://hero-civilization.wikia.com/wiki/Cripple

awe

http://hero-civilization.wikia.com/wiki/Awe

fiery curse

http://hero-civilization.wikia.com/wiki/Fire_curse

poison

http://hero-civilization.wikia.com/wiki/Poison

disrupting gale

http://hero-civilization.wikia.com/wiki/Disrupting_gale

ominous signs

http://hero-civilization.wikia.com/wiki/Ominious_signs

berserk

http://hero-civilization.wikia.com/wiki/Berserk

water shield

http://hero-civilization.wikia.com/wiki/Water_shield

inspire

http://hero-civilization.wikia.com/wiki/Inspire

protect

http://hero-civilization.wikia.com/wiki/Protect

resurrection.

http://hero-civilization.wikia.com/wiki/Ressurection