Dragon Nip

'Dragon Nip is like Cat Nip to dragons as it makes an out-of-control-in-raged dragon calm and happy.

Appearance
Lush green grass with a sweet calming sent that can calm dragons down and can be used in dragon training and bonding.

Lore
While Hiccup was testing and working on Toothless's tail-wing to help in the Night Fury fly again, the two crashed landed in grass that made the happy, calm and make him felt like he was in heaven with it sent. Later Hiccup used it in in Gobber's Dragon Training to get past and 'take down' a Gronckle.

Dragon Nip is said to help Vikings train an angry Gronckle and bond with it, it even clams dragons that are full of energy lay down once they eat or smell the grass. But for some reason is has no affect on a Whispering Death?

Role in the Crossover
The Big Four use the grass when they come across a dragon that it is angry or sees them as a fret when they need its help, wings or fire.