Board Thread:Game Discussions/@comment-162.129.251.88-20140314233806/@comment-24108837-20140321225906

Guild bonus can easily be more than 10 %. The guild bonus is per element. So if you have the 100,000,000 guild bonus on 2 elements you will have 20%. Also your rank in the guild counts. A guild master gets an additional 10%, a guild sentinel or champion 7% and a high commander gets 5.

Many guild members can have a total 25% guild bonus on both attack and defense and higher up members can have a 27% or even a 30% bonus.

Presumably starmetal will hold the 5, 7 or 10% rank bonus, but never the 20% element bonus.