ILLUSTRATOR Caio Monteiro LEGALITIES Standard Future Historic Timeless Gladiator Pioneer Modern Legacy Pauper Vintage Penny Commander Oathbreaker Standardbrawl Brawl Competitivebrawl Alchemy Paupercommander Duel Oldschool Premodern Predh Tlr LANGUAGES EN RULINGS 2020-06-23 The triggered ability looks at whether you've gained life in the turn, even if Witch of the Moors wasn't on the battlefield when you gained life
By turn 5 you can easily find yourself drawing 3+ extra cards per turn
On the surface(s) they feel like split cards since you have two different options on each card, but they solve the split card problem by allowing one or both sides to be permanents
They do, however, introduce new concepts with a higher complexity than starter decks
Since this may be a bit confusing, and is not spelled out on The Tenth Doctor card itself: Doctor Who introduced the Doctor's Companion mechanic which, in spite of its name, has nothing to do with the companion mechanic , and everything to do with the partner mechanic