Keep Out!!! Description; Frag Grenade explosions leave a residual energy field, doing 15% of the initial grenade blast damage every 1 second, over 10 seconds.A keep (from the Middle English kype) is a type of fortified tower built within castles during the Middle Ages by European nobility.Scholars have debated the scope of the word keep, but usually consider it to refer to large towers in castles that were fortified residences, used as a refuge of last resort should the rest of the castle fall to an adversary.
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