Does Ahri Legend's ability trigger when multiple enemy units attack together, and does it affect all attacking units?

Ruling: Ahri Legend's ability triggers individually for each enemy unit that attacks. When multiple units attack together, the ability triggers multiple times (once per attacking unit) and each attacking unit gets their might decreased.

Sequence:

• Each attacking unit is individually declared as an attacker
• Ahri Legend's ability triggers separately for each attacker
• Each trigger resolves individually, decreasing that attacker's might

Nuances:

• The ability does not require the enemy to attack alone (unlike Master Yi's defense ability which specifies "attacks alone")
• If 3 units attack, the ability triggers 3 times