a new 8 hrs , 50% generals speed increasing zone buff: travel, jogg, attack, recovery
new production building or not, but made of tokens and star-coins , not tradable/giftable
or maybe a new tribute (lets call it an epic tribute) gotten from a new achievement, that'll drop when time's up
affecting all types of adventures
it'll cancel standard blocks but at least you'll have players venturing for a longer time