Deathtouch
At the beginning of your end step, if you gained life this turn, each opponent sacrifices a creature of their choice and you return up to one target creature card from your graveyard to your hand.
As the triggered ability resolves, first the next opponent in turn order chooses a creature they control, then each other opponent in turn order does the same knowing the choices made before them. Then all the chosen creatures are sacrificed at the same time.
23-06-2020
wotc
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. It doesn't care if you also lost life, even if you lost more life than you gained.
23-06-2020
wotc
You don't have to choose a target creature card at all. If you do and the target card is an illegal target by the time the ability tries to resolve, the ability won't resolve. Your opponents won't sacrifice creatures.
23-06-2020
wotc
The triggered ability triggers just once, no matter how much life you've gained.
23-06-2020
wotc
If you haven't gained life by the time your end step begins, the triggered ability won't trigger at all.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.