I like the idea of having an item that will make counterjungling strong.
Why not have something like...increased damage to jungle monsters AND champions while in the enemy jungle.
Then increased gold for kills and jungle monster kills in the enemy jungle.
That would make counterjungling and dueling relevant again.
The jungle duelist bullies like Trundle, Shyvana, Skarner, Volibear, Mundo and Udyr are very far out of meta right now.
I used to love pushing people out of their jungle. Now that's not even a viable strategy. The only counterjungling now is Nunu and a few others who just steal stuff when you're not around. Hence the movement speed buff on poacher's.
That's the problem. No one cares about that MS buff. You need to provide something tangible, like extra damage to push enemy junglers out.
Im not against that either, although it might get a little to strong later if your ahead and have them pushed to base. I like the concept, riot would have to play with it i think tho