Zero's Circle of Protection

Card Number

ENW-017

Rarity

U

Cost

W2

ATK/DEF

Type

Addition

Race and Trait

Illust

saumaro

Card Text

Continuous

As this card enters your field, choose an attribute.

Continuous

J/resonators you control gain [Barrier](Chosen attribute).

Flavor Text

"To the circle everyone! Quickly!" -Zero, the King's Blade

Errata

New Text Enforce : 2017-06-16

New

As this card enters your field, choose an attribute.

Old

When this card enters your field ⇒ Choose an attribute.

All Sets

Rulings

Zero's Circle of Protection has you choose an attribute and then Barrier is applied to what? Could be read as either: (a) J/resonators of attribute gain Barrier or (b) all J/resonators of any attribute gain Barrier from attribute. Which?
The card states "J/resonators you control" that means any J/resonator you control regardless of other factors. If it's a J/resonator and you control it, it will be affected by this ability.

The second part says "gain [Barrier] (Chosen attribute)". This means they gain Barrier against whatever attribute you chose as you played the card, as is the normal expression of Barrier when it applies to specific attributes. As the Comprehensive Rules state: 1120.3. "[Barrier] <Information> " means "This card cannot be targeted by <Information> spells or abilities controlled by a player other than the controller of this card.".