To populate means to choose a creature token you control and create a token that’s a copy of that creature token.
June 18, 2021 · Modern Horizons 2
“Investigate” means “Create a Clue token.” See rule 111.10f.
July 3, 2020 · Core Set 2021
“Investigate” means “Create a colorless Clue artifact token with ‘{2}, Sacrifice this artifact: Draw a card.’”
May 3, 2019 · War of the Spark
Meld is a keyword action that appears in an ability on one card in a meld pair. (See rule 712, “Meld Cards.”) To meld the two cards in a meld pair, put them onto the battlefield with their back faces up and combined. The resulting permanent is a single object represented by two cards.
January 25, 2019 · Ravnica Allegiance
Meld is a keyword action that appears in an ability on one card in a meld pair. (See rule 712, "Meld Cards.") To meld the two cards in a meld pair, put them onto the battlefield with their back faces up and combined. The resulting permanent is a single object represented by two cards.
April 27, 2018 · Dominaria
Meld is a keyword action that appears in an ability on one card in a meld pair. (See rule 712, “Meld Cards.”) To meld the two cards in a meld pair, put them onto the battlefield with their back faces up and combined. The resulting permanent is a single object represented by two cards.
September 30, 2016 · Kaladesh
Certain spells and abilities can goad a creature. Until the next turn of the controller of that spell or ability, that creature attacks each combat if able and attacks a player other than that player if able.