In a determined effort to make Summoning and its rewards more attractive, we have rebalanced large chunks of the skill and introduced a horde of high-level familiars! It's time to brush off the headgear, fill your pockets with charms and get back to a skill that makes using familiars far more appealing - from larger familiar inventories to combat XP for your Summoning kills.
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http://news.runescape.com/newsitem.ws?id=1155