If an opponent casts Dragon's Rage targeting my unit, and I use Hidden Blade to kill it and then use Sett's legend ability (The Boss) to move it back to base in response, does Dragon's Rage still resolve and does it count as a conquer?

Ruling: Dragon's Rage will still fully resolve even if the targeted unit is killed and moved with The Boss in response. The unit remains a valid target because it's the same game object and hasn't changed zones, and Dragon's Rage has no targeting restrictions beyond "enemy unit."

Sequence:

• Dragon's Rage targets an enemy unit and chooses a destination
• If Hidden Blade kills the unit and The Boss moves it to base in response
• Dragon's Rage still resolves and attempts to move the unit
• If the unit is already at the chosen destination, the movement can't happen (movements require different origin and destination)
• The reflexive trigger still goes on the chain using the originally chosen destination
• The reflexive trigger resolves normally

Nuances:

• Even if the movement doesn't actually occur (because the unit is already at the destination), the reflexive trigger still uses the originally chosen destination and proceeds normally
• Using Hidden Blade and The Boss will not prevent any part of Dragon's Rage from happening