If Gust is cast on a spell and the opponent reacts with En Garde to increase the unit's might above 3, does Gust still take effect?

Ruling: Gust will not have any effect if En Garde increases the unit's might above 3 before Gust resolves.

Sequence:

• Gust is cast targeting a spell
• En Garde is played in reaction, increasing the unit's might above 3
• Gust still resolves but has no effect

Nuances:

• Gust still counts as having been played and resolved, which matters for effects that care about cards or spells being played, even though it has no effect on the target