Security Dragon

Security Dragon
Light Cyberse / Link / Effect
Link 2 ?/ T B
2 monsters
You can only use this card name’s effect once per turn.
(1) Once, while this card is face-up, if this card is co-linked: You can target 1 monster your opponent controls; return it to the hand.

ماذا تعني كلمة c-linked ? استاذنا العزيز XDD :3