The enemy raids once at the beginning of the first Round, and 2 random Runestones will be weathered. After that, 1 random Runestone will be weathered each Round. The lower the enemy's HP, the more Runestones will be weathered, to the max 4 Runestones per Round. If any Weathered Runestone is touched, Runestone movement will be stopped immediately and a Damage of 3,000 will be dealt to Summoner. The lower the enemy's HP, the more times it attacks in a Round.