Historical Rules · 3 May 2019
Rule 609.4a
Official source text from the 3 May 2019 Rules release
If two effects state that a player may (or a creature can) do the same thing “as though” different conditions were true, both conditions could apply. If one “as though” effect satisfies the requirements for another “as though” effect, then both effects will apply. Example: A player controls Vedalken Orrery, an artifact that says “You may cast nonland cards as though they had flash.” That player casts Shaman’s Trance, an instant that says, in part, “You may play cards from other players’ graveyards as though they were in your graveyard.” The player may cast a sorcery with flashback from another player’s graveyard as though it were in that player’s graveyard and as though it had flash.