The List

Call of the Herd

Create a 3/3 green Elephant creature token.
Flashback {3}{G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Dominaria Remastered

Duel Decks: Mind vs. Might

Modern Masters 2017

Magic Online Promos

Grand Prix Promos

Time Spiral Timeshifted

Put a 3/3 green Elephant creature token into play.
Flashback {3}{G} (You may play this card from your graveyard for its flashback cost. Then remove it from the game.)

World Championship Decks 2002

Odyssey

Put a 3/3 green Elephant creature token into play.
Flashback o3o
G (You may play this card from your graveyard for its flashback cost. Then remove it from the game.)