A thought for dragon.

Now, we lose tracker's knife. It means we lose much vision. So, how about a new dragon for promoting totem?

For red oracle, it will be increased 2/4/6 seconds. For blue farsight alteration, cooling down -10%/20%/30%. For yellow invisible ward and control ward, the HP increase 1/2/3. And the exist time increase 10%/20%/30% for invisible ward.