At the beginning of combat on your turn, if you both own and control this creature and a creature named Midnight Scavengers,
exileTo exile an object, move it to the exile zone from wherever it is. See rule 406, “Exile.” (CR 701.13) them, then
meldMeld is a keyword action that appears in an ability on one card in a meld pair. 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. See rule 712, “Double-Faced Cards.”
Only two cards belonging to the same meld pair can be melded. Tokens, cards that aren’t meld cards, or meld cards that don’t form a meld pair can’t be melded.
If an effect instructs a player to meld objects that can’t be melded, they stay in their current zone. (CR 701.42) them into Chittering Host.