#578233
To be helpful, in this post I'll try to include all relevant rules (both rulebook and glossary).
Rulebook: The Play Phase
Rulebook: The Play Phase
You may not normally interrupt your own actions, or your opponents' actions, unless you use a card that is a valid response to that action or a card that suspends play.Rulebook: Playing "At Any Time"
[snip]
If a card is not a valid response to the current action, it cannot be used until after the current action has resolved. [snip] The only exception is cards which state that they suspend play. A card that suspends play (like The Guardian) may interrupt any action.
Interrupts, and several other cards (like Out of Time), play "at any time." You may play them at any time, during any phase of your turn or your opponent's.Rulebook: Special Download
[snip]
Even a card that plays (or activates) "at any time" may not interrupt another action in progress, unless it suspends play or is a valid response to that action.
[snip]
Cards that play "at any time" likewise may not play between start-of-turn or end-of-turn actions, like probing or using Tyranny.
A card with a Special Download icon allows you to suspend play at any point during the game (including during a seed phase or an opponent's turn), interrupting other actions as necessary, while you download the target card and immediately play it.Glossary: at any time
This phrase indicates that an action may be used during any phase of either player's turn (except start-of-turn or end-of-turn), between other actions or as a valid response. It may not interrupt other unrelated actions.Glossary: downloading - special download
A card with a special download icon allows you to suspend any action at any time (even during your opponent's turn) while you download the specified target card and immediately play it.Glossary: suspends play
A card which specifically says it "suspends play" may be played at any time during the play phase (even during your opponent's turn) and may interrupt and temporarily suspend any action.
[snip]
If no action is in progress, an action that may suspend play (such as using a special download icon) does not suspend anything. You may not suspend play during the seed phases.