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|Skill Type||Leader Skill|
|Skill Name||Unbreakable Oath of Fraternity|
|Skill Effect||When the Team consists of only Water, Fire and Earth Monsters:
Water Runestones also possess 50% effects of Fire and Earth Runestones; Fire Runestones also possess 50% effects of Water and Earth Runestones; Earth Runestones also possess 50% effects of Water and Fire Runestones (effects can be superimposed). If 2 out of 4 types of Runestones (Water, Fire, Earth and Heart) are dissolved in the same Round, Team Attack x 2.5; if 3 types are dissolved, Team Attack x 3.