
This card is okay to bad in most cases. As is, it probably needed to be "fast:play only on your turn" to be viable.
That isn't to say it isn't without its uses. Spending one action to bar non-elites from a central location or a final spot can be great.
Card slots in this game are at an extreme premium and anyone who moves into your location will be "trapped" there as well until the barricade comes down.
With that said, there might be a build for multiplayer that relies on this card and sitting in one spot while your team exposes locations and your seeker uses cards like "In The Know" "Decipher Reality" and "Seeking Answers" to save actions on moving while the team is out exploring.
But even then, right now that kind of a "Base Camp" build is fringe at best. If you set up your base camp, no one will be coming in or out. Also, who will be your base camper? Minh likely won't get as many ability triggers tucked away from everyone. That leaves Daisy, Norman and Rex.
Given the choices, I would probably choose Norman or Daisy as they can run Ward of Protection level 2 and other cards that let you dodge the encounter deck.
I really want to like this card and maybe, if it ever gets an experience upgrade it will see some play. Until then folks, builder beware.