this is the scenario: an attack´s damage is reduced to 0. in the block step, activate holding ground. my question is: what happen in this case?.

because there are two concepts, deal damage and take damage, is possible take damage 0 and activate holding ground to return damage to printed value?

Thanks for yours answers

holding ground is not activated in the block step but in the damage step. If your attack's damage is reduced to zero and your opponent chooses not to block, you can respond with holding ground during the damage step to reset the damage of the attack to its printed. Since no block was played, he takes the full damage of the attack

the "when a player is taking damage" clause is only refering to the damage step because that is the portion of the attack where you calculate damage. You can activate holding ground when they are taking "0" damage.

Basically what Maida said (stampish)