Tomes of damage were stat boosting items in early builds of Heroes of the Storm. Three 'ranks' of them existed.
Cost 350 gold.
Cost 400 gold.
Cost 500 gold. Grants a 10% damage increase. Ability damage, ability healing and shields are increased by 5%.
Blizzard Entertainment. 2011 Blizzard DotA Press Kit. Blizzard Entertainment. Accessed on 2012-05-03
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