Does anyone know how to become a sapphire member?

[Hismandent]

Hello,

I'm trying to do trial runs on inferno but it says I have to be a sapphire member to access the option where you start from waves 67+. Does anyone know how to become a sapphire member?

Thanks,

Outlaw

[Robbin Hood]

Sapphire donator level is achieved by having a combined minimum total of 100 redeemed/ordered bonds. Bonds can be obtained through voting/daily skilling task(1), donating through the Store link, or bought via in-game currency, from players.