Does Emma Frost keep her +1 Attack from a Sidekick you already played once that has gone back to the Sidekick stack?

Question

Accepted Answer

No. A played Sidekick that has returned to the stack no longer counts as a Hero you have, so it stops adding to Emma Frost's bonus. Earlier replies that kept the bonus active were overtaken by a later answer, which is the one that applies now.

Legendary: A Marvel Deck Building Game

Does Emma Frost keep her +1 Attack from a Sidekick you already played once that has gone back to the Sidekick stack?