Is it a one time thing? Can you unbind and rebind to another? And for those not in the loop, the buff is 15% fervor solo and 30% total if the other person is online which IMO is a stupid amount. I would much rather it be a more general buff or something less must have. Like an xp or status boost togther or making heartbound players get extra bonuses from food or drink made by their spouse, or the stone functioning as a single person CoV.