Does playing a Mighty unit with Dazzling Aurora cause Volibear Legend to trigger?

Ruling: Yes, playing a Mighty unit with Dazzling Aurora will trigger Volibear Legend's ability.

Nuances:

• Dazzling Aurora uses the word 'play', which means units played through its ability count as being played for the purposes of triggering other abilities like Volibear's "When you play a Mighty unit" effect.