From DominionStrategy Wiki
|Exile an Action card from the Supply. While it's in Exile, when another player gains or Invests in a copy of it, +2 Cards.|
 Official FAQ
- It only matters if the card you Exile is an Action, not if the whole pile is.
- While the card is Exiled, you draw 2 cards each time another player gains a copy of it, or uses Invest to Exile a copy of it.
- This is not optional.
- This is cumulative; if you Invest twice in the same card, you will get +4 Cards each time someone else gains a copy or Invests in it.
- If the game has another way to Exile cards, keep the Invested ones separate from the other ones; for example, you can put them half under the mat.
- Those other Exiled cards were not Invested and do not draw you cards.
- Cards Exiled with Invest can be discarded from the mat in the normal way, by gaining another copy of the card; then you will no longer draw cards for players gaining/Investing in them.
 English versions
|Exile an Action card from the Supply. While it's in Exile, when another player gains or Invests in a copy of it, +2 Cards.||Menagerie||March 2020|
 Other language versions
|German||Investition|| Verbanne eine Aktionskarte aus dem Vorrat.Solange sie im
Exil ist: Wenn ein Mitspieler eine gleiche Karte nimmt oder durch
Investition verbannt: +2 Karten.
|Japanese||投資 (pron. tōshi)|
 Secret History