In DOTA there is a hero called Bloodseeker and his ultimate is called Rupture.
Causes an enemy unit's skin to rupture, dealing massive damage. If the unit moves while under the effect of Rupture, it takes a percentage of the distance traveled as damage.
Initial damage: 150/250/350
Distance moved damage: 20%/40%/60%
I was just thinking that since Ferals are all about bleeds that rupture would suit them well but since the DOTA style wouldn't work, a changed version would suit them.
Something like this:
Cooldown: 2 minutes
Rend your targets flesh causing them to bleed for 60, 000 damage over 10 seconds and applying Gushing Wounds.
Damaged for 0.8% of your max hp every 0.1 seconds while in motion. Lasts 10 seconds. Physical.
Equals out to 80% of your max hp if you continue to move the whole time.
I think it would be an interesting mechanic that hasnt been seen before