The set of creatures affected by Chittering Host’s triggered ability is determined as the ability resolves. Creatures you begin to control later in the turn won’t get +1/+0 or gain menace.
13-07-2016
wotc
For more information on meld cards, see the Eldritch Moon mechanics article (https://magic.wizards.com/en/articles/archive/feature/eldritch-moon-mechanics-2016-06-27).
13-07-2016
wotc
If a card in a player’s graveyard has {X} in its mana cost, X is considered to be 0.
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.