Healing Sphere's energy cost reduces during battle?

[Nanaboostme]

For some reason I just noticed it now, but it seems the longer I stay in battle, the less energy healing sphere costs. I've seen it go down to 23 energy costs. How come I can't find this on the passive list? Was this a hot fix or something?

[Aleksej89]

I have never seen this.

However i rarely cast it using that spell, always seemed a tad too expensive during leveling.

[Arkenaw]

Were you by any chance fighting these: http://www.wowhead.com/npc=65635#abilities

They have an ability that reduces resource cost.

[Nanaboostme]

Were you by any chance fighting these: http://www.wowhead.com/npc=65635#abilities

They have an ability that reduces resource cost.

YES!!! Oh dammit they need to implement it in general please