MjTh
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But if you look at it more closely, I've never seen a Warlock hero with more than 230-250 mana. With enhanced spells, you'll quickly exhaust yourself; consider Earth Shock and Meteor Shower. With average stats of 120-130 mana, you'll have a maximum of 3 turns in prolonged battles after 5-6 months. A Sylvan will last longer, especially against Necropolis and Haven.