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Polishing Skill Pic Base crystal output increases starts at 10 and rises to 30 while total output increases by 5% per level, up to a maximum of 50%.
This is a passive spell that always stays active in any castle that researches it.

Strategy Edit

Upgrading this spell to level 1 is top priority when starting a new castle. The low cost of level 1 and the additional 20 crystal will literally pay for itself in several hours.

An advanced strategy involves getting all mines of the same resource type and only upgrading one of the resource skills to 10. This works because HoG currently imposes no cost or time delay when trading resources between types. This may change in future expansions.

Upgrades Edit

Level Base
Increase
%
Increase
Resources needed to upgrade Time
(hh:mm:ss)
Fame Requirements
Lumber Ore Sulfur Crystal Gold
1 10 5% 50 50 18 33 500 00:20:00 15 Elf, Human, Orc, Undead Magic Tower lvl 1
2 12 10% 200 200 70 130 2000 01:00:00 60 Elf, Human, Orc, Undead Magic Tower lvl 2
3 14 15% 450 450 158 293 4500 03:08:20 135 Elf, Human, Orc, Undead Magic Tower lvl 2
4 16 20% 800 800 280 520 8000 05:40:00 240 Elf, Human, Orc, Undead Magic Tower lvl 3
5 18 25% 1250 1250 438 813 12500 08:55:00 375 Elf, Human, Orc, Undead Magic Tower lvl 3
6 20 30% 1800 1800 630 1170 18000 12:53:20 540 Elf, Human, Orc, Undead Magic Tower lvl 4
7 22 35% 2450 2450 858 1593 24500 17:35:00 735 Elf, Human, Orc, Undead Magic Tower lvl 4
8 24 40% 3200 3200 1120 2080 32000 23:00:00 960 Elf, Human, Orc, Undead Magic Tower lvl 5
9 27 45% 4050 4050 1418 2633 40500 29:08:20 1215 Elf, Human, Orc, Undead Magic Tower lvl 6
10 30 50% 5000 5000 1750 3250 50000 36:00:00 1500 Elf, Human, Orc, Undead Magic Tower lvl 7
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