Wanted to play the 057 Apocalypse from the new set, and he has a few of these stop clicks

Summon our full might: STOP. Apocalypse can't be damaged by opposing effects, healed, or chosen for Mastermind. // At the beginning of your turn, generate an Daemon bystander within six squares. // At the end of your turn, deal Apocalypse 1 unavoidable damage.

how would that interact with Muramasa Blade
INDESTRUCTIBLE
EQUIP: ANY
UNEQUIP: DROP
EFFECT: Blades/Claws/Fangs. When this character uses it and rolls a 1-3, the hit character can't use defense powers until the beginning of your next turn.

this came up today, would you still get to use the stop clicks if they roll a 1-3 cause its an opposing effect, or does it means I can't use the summon full might power at all?

Summon Our Full Might is a Defense power. Why do you think you would be able to use it if the attacker rolled a 1-3 with the Murasma Blade?

" Apocalypse can't be damaged by opposing effects"

The roll for the Murasama Blade is before damage would be dealt. 1-3, it can't be used.

would the damage not be considered an opposing effect?

I think where I'm getting mixed up is how is it getting around an "opposing effect."
is there maybe a precedent ruling that would be similar or something in the rule book you can point that would maybe dumb it down for me?

Muramasa Blade
INDESTRUCTIBLE
EQUIP: ANY
UNEQUIP: DROP
EFFECT: Blades/Claws/Fangs. When this character uses it and rolls a 1-3, the hit character can't use defense powers until the beginning of your next turn.

The character doesn't ned to damage to not be able to use defensive powers (including SUMMON OUR FULL MIGHT). So if they get hit by MURAMASA BLADE and the attacker rolls 1-3, the target can't use Defense powers including SUMMON OUR FULL MIGHT

Getting hit has nothing to do with getting damaged. This is the attack sequence:

Here is the text for BCF:

The roll for Blades is well before step 5, and once the character using the MB rolls a 1-3, Apocalypse can no longer use Summon Our Full Might.

hey, i forgot to respond, thank you! Breaking it down like this clears things up!