Effect
2 Level 4 DARK monsters Once per turn (Quick Effect): You can detach 1 material from this card; this face-up card is unaffected by other monster effects this turn.
The monster effect of "Steelswarm Roach" is a Quick Effect. (It cannot be activated during the Damage Step.)
This effect does not target. (It is an effect applied to "Steelswarm Roach" itself.)
When activating the effect, detach 1 Xyz Material from this card as a cost.
If "Steelswarm Roach" is in face-down Defense Position when the effect resolves, the effect "this turn, this card is unaffected by other monsters' effects" is not applied. Furthermore, if "Steelswarm Roach" is changed to face-down Defense Position after the effect has been applied, the effect "this turn, this card is unaffected by other monsters' effects" stops being applied.
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