Does Dragon's Rage deal damage when the moved unit is prevented from moving by Vilemaw's Lair, since the card text references 'its destination' rather than 'its location'?

Ruling: If the unit fails to move due to Vilemaw's Lair, it fails to enter "its destination" so the reflexive trigger fails to finalize and no damage is dealt.

Nuances:

• "Destination" refers to where the unit is going to be moved to, not where it currently is
• The unit must successfully move and enter its destination for the reflexive trigger to resolve