Kayn Q Bug
In Rhaast form, if you have a death's dance it will not heal the max health damage that is dealt by Kayn's q. This is hard to see on champions due to his passive, but if done on minions and monsters it can be seen that if you do 400 damage it would only heal for 23 when it should heal for 60 and be visible to the player that you healed for said amount. The Max health damage is done as physical and should be healed by deaths dance however it is not.