Is the Bond of Stone change intended to be a Nerf? How Do you justify this if Thunder Lord's exists?
Currently, and for the foreseeable future, Bond of Stone is only used on tanky supports. Tanky laners will continue to take grasp because it's extremely strong in lane, and Tanky junglers most likely can't afford to take the extra damage, since they are working with limited gold and are frequently the primary initiators for their team.
If we accept that this mastery is only for tanky supports then this is a straight up nerf, which I don't understand. How can you justify nerfing bond of stone if Thunder Lord's Decree is the "goalpost"
do very well with 45% CDR and Thunderlord's Decree for stronger laning phase. Sometimes I even take Grasp of Undying for
. You don't have to take Bond of Stone for Tank Supports if you think it is too weak. There are enough alternatives.