As far as the dog was concerned, anything that fit in its mouth was a toy.

Foundations

Mischievous Pup

Flash (You may cast this spell any time you could cast an instant.)
When this creature enters, return up to one other target permanent you control to its owner's hand.

"Either he made a gnome very angry when he took that, or he'll make one very happy when he brings it back."
—Ihio, Oteclan market vendor

The Lost Caverns of Ixalan

Flash
When Mischievous Pup enters the battlefield, return up to one other target permanent you control to its owner's hand.