Global: Pay [1 Fist] . Target blocked monster deals no damage.
Gaia the Fierce Knight
If this monster is blocked and not knocked out, it also deals half its damage (rounded down) to your opponent.
If my opponent attacks with Gaia the Fierce Knight and I block it with a sidekick. Then I pay 1 fist to activate Mirror Force's global to keep my sidekick alive.
Does Gaia the Fierce Knight's ability still do damage to me? Or Does the global prevent all damage from Gaia the Fierce Knight?