Can you Gust your own 3 might Ravenbloom Student?

Ruling: Yes, you can successfully Gust your own 3 might Ravenbloom Student. The spell will return it to your hand before the Student's "when you play a spell" trigger can activate and increase its might to 4.

Sequence:

• You cast Gust targeting your 3-might Ravenbloom Student
• Gust fully resolves and returns the Student to your hand
• Only after Gust finishes resolving is it considered "played"
• Ravenbloom Student's trigger would activate, but the Student is already in your hand, not on the battlefield
• Gust successfully returns the Student to your hand

Nuances:

• "When you play" triggers only activate after a card finishes resolving, not when it is cast or finalized
• Since the Student is removed from the battlefield as part of Gust's resolution, it cannot receive the +1 might buff from its own trigger
• Target legality is checked both when the spell is cast and when it resolves, but in this case the Student is removed before it can become 4 might