Talk:Udyr/@comment-5877442-20140606162059/@comment-3148314-20140705160652

Google is your friend (didn't know what it was, so I searched for it).

It seems to be Spirit Stone. Seems to be a common way to improve his early jungle clear/mana consumption and will probably be sold in mid-/lategame.

http://www.mobafire.com/league-of-legends/build/do-not-deny-your-instincts-phoenix-udyr-madstone-build-383329