How does Royal Entourage's ability to exhaust enemy legends interact with different legendary units (Daughter of the Void, The Boss, Blind Monk, and Lux)?

Ruling: Royal Entourage can legally exhaust enemy legends, but the practical impact varies by legend. Tapping legends prevents them from using abilities that require tapping as a cost.

Sequence:

• Daughter of the Void: You can exhaust it, but opponent can respond by tapping it to add power before it becomes exhausted
• The Boss (Sett): Exhausting it prevents its use since the legend requires tapping to activate
• Blind Monk: Exhausting it has no practical effect unless done on their turn before they use it
• Lux: Exhausting it doesn't affect its passive ability, but it remains tapped until opponent's next awakening

Nuances:

• Opponent can respond to exhaustion effects by using tap abilities before the exhaust resolves
• Some legends have passive abilities unaffected by exhaustion
• Timing matters - exhausting on opponent's turn can prevent tap abilities from being used that turn