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I've already seen the "Mana Accelerator" in action. I started on easy, so there's enough mana for the battle, but then it drops to 0 :(. That's why it's very convenient to create a blue orb during the battle so that at least 20 units remain after the battle.
No, volcanoes and other similar objects cause me more damage :(. Perhaps "Treasure Hunter" is still better for income :).
Added 1 minute ago
By the way, about the "Mana Accelerator." It costs a bit too much (in terms of rage). And the stronger you develop it, the bigger the gap becomes. But it's really useful at the beginning :).
No, volcanoes and other similar objects cause me more damage :(. Perhaps "Treasure Hunter" is still better for income :).
Added 1 minute ago
By the way, about the "Mana Accelerator." It costs a bit too much (in terms of rage). And the stronger you develop it, the bigger the gap becomes. But it's really useful at the beginning :).