Elven Resolve

is a tier 5 boon from the Sharandar Campaign.

The alternate boon choices are Fey Thistle, Elvish Fury and Redcap Brew.

To unlock this boon, you need to spend 6, 60, 250, 9, 9 and 9.

Additional Notes
Excluding the cost and considering you have no left-over campaign currency, you would need to do all the dailies available in Sharandar for 2 weeks to unlock this boon.