2017-09-29 : For the last ability of Temple of Aclazotz, use the creature’s toughness as it last existed on the battlefield to determine how much life you gain.

2017-09-29 : If your life total is 6 or greater as the second ability of Arguel’s Blood Fast tries to resolve, it won’t do anything.

2017-09-29 : If your life total is 6 or greater as your upkeep begins, the second ability of Arguel’s Blood Fast won’t trigger. You can’t take any actions during your turn before your upkeep begins.

2017-09-29 : Once you’ve announced the last ability of Temple of Aclazotz, it’s too late for anyone to interrupt you by trying to remove the creature you sacrifice.

2018-01-19 : For more information on double-faced cards, see the Ixalan mechanics article (http://magic.wizards.com/en/articles/archive/feature/ixalan-mechanics).