Does a unit played from trash by Spectral Matron's ability trigger Spectral Matron's Legion ability?

Ruling: Yes, the unit played from trash triggers Spectral Matron's Legion ability.

Sequence:

• Spectral Matron is played first
• Then the unit is played from trash
• By the time the unit from trash is played, Spectral Matron is already in play, so its Legion ability triggers