Mark of Valor, Tournaments.

Mark of Valor can be obtained by exterminating Mortal enemies, completing of missions and by participating in weekly quest cycle (Pacman, Mouse run, ...) for the Quest Charter or in the shop for quest points.
Mark of Valor is a potion, by drinking it the half hours effect of Horn of Plenty, Divine Power-up and Unexcelled Accuracy will be applied on the character. Also Marks of Valor can be exchanged for valuable prizes.

It's not necessarily to have a ticket with you for participation in automated tournaments. In order to enter you may use a command \tourney by the time of the countdown for the beginning of the tournament of your level span.