Reality is cruel, and fairness can only ever be relative, never absolute.
The Sky-reaching Tower is no exception. A month of safety is the final tenderness before plunging into a brutal war, where either new or veteran Lords, as long as they are of the same rank, can attack each other.
Even with different ranks, forceful attacks are possible but come at a substantial cost, requiring the use of some extremely rare items, making it hardly worth it.
Therefore, after the safety period ends, the primary challenge that new Lords face is the aggression from veteran Lords, especially those high on the prestige leaderboard with considerable potentiality and strong troop attributes, owning Second-Order soldiers, which present a significant challenge for new Lords.