It looks like we can add Magic: The Gatehring to the list of "stuff that has a Puzzle Quest spin-off." D3 Go! and Wizards of the Coast have officially announced that the popular collectible card game will be getting it's own match-3 puzzler later this year.
Magic: The Gathering - Puzzle Quest is basically regular Puzzle Quest but with Plainswalkers and familiar spells, artifacts, and creatures from the Magic series. Basically. The idea is for it to use the familiar match-3 gameplay as the framework but keep everything set in the Magic universe while offering options such as competitive tournaments and daily quests - to interest fans from both camps.
It's not out yet, but you'll be able to download Magic: The Gathering - Puzzle Quest for free once it's available later this fall.