遮蔽する粘体

エンチャント（クリーチャー）
遮蔽する粘体が戦場に出たとき、カードを１枚引く。
エンチャントされているクリーチャーは、対戦相手がコントロールしている呪文や能力の対象にならない。

Shielding Plax

({G/U} can be paid with either {G} or {U}.)
Enchant creature
When this Aura enters, draw a card.
Enchanted creature can't be the target of spells or abilities your opponents control.

Forgotten Realms Commander

Enchant creature
When Shielding Plax enters the battlefield, draw a card.
Enchanted creature can't be the target of spells or abilities your opponents control.

Ultimate Masters

Dissension

({GW} can be paid with either {G} or {U}.)
Enchant creature
When Shielding Plax comes into play, draw a card.
Enchanted creature can't be the target of spells or abilities your opponents control.

This is not the same as hexproof. If, for example, you target one of your opponent's creatures, your opponents won't be able to target their own creature with spells or abilities.

If the target creature is an illegal target by the time Shielding Plax tries to resolve, the Aura spell doesn't resolve. It won't enter the battlefield, so its enters-the-battlefield ability won't trigger.