If Gust targets a Stalwart Poro, can you respond with a reaction to increase the Poro's might above 3 to prevent Gust's effect?

Ruling: Yes, you can play a reaction spell to raise the might above 3. Gust will still resolve but won't do anything because it checks the target's might at resolution, not just at activation.

Nuances:

• Gust does not "fizzle" - it resolves without effect if the target is no longer valid