The Alliance Boss Kill tournament got introduced shortly after the introduction of Alliance Bosses on the campaign map. During normal play, the Bosses can be summoned and killed to receive rewards including Vala Stones, gear, Valto runes and Gatherer Stones to level up your City Guardian. During Boss kill tournaments, you get points for killing the bosses. It is a pretty straightforward principle, so this article wil not be that long or complicated.
Like mentioned in my post on update 9.1.0, it brought to the game the exciting new feature of Alliance Boss Battles.
At the time of writing that piece, the feature had not been fully implemented yet, but it has in the mean time, and it is such an addition it merits its own article. So here, I will lay out all the necessary information you need about this feature.