There's a whole means of this into the multiplayer portion of the comp principles. The top take-away is this: once you pass away, your material renders the overall game - then, afterwards, in the event that you would still manage anything (e.g. a permanent you took from somebody else), that thing is exiled; any triggered abilities you'd own don't take place.
800.4. Unlike two-player games, multiplayer games can carry on after several people have remaining the game.
800.4a. When a new player renders the game, all items (see rule 109) had by that player keep the video game, any effects which give that player control over any objects or players end, and all sorts of spells and abilities controlled by that player on the pile cease to exist. After that, if you can find any objects however controlled by that player, those items are exiled. This isn't a state-based action. It occurs as soon as the ball player simply leaves the game. If the player who left the overall game had concern at the time he/she left, concern passes to another location player in turn purchase who’s nonetheless inside online game.
Instance: Alex casts Control Magic, an Aura that checks out, “You control enchanted creature, ” on Bianca’s Wall of Wood. If Alex simply leaves the overall game, so does Control Magic, and Wall of Wood reverts to Bianca’s control. If, alternatively, Bianca leaves the game, so does Wall of Wood, and Control Magic is placed into Alex’s graveyard.
Example: Alex casts Threaten, which checks out, partly, “Untap target creature and gain control over it until end of change, ” targeting Bianca’s Wall of Wood. If Alex renders the game, Threaten’s change-of-control impact finishes and Wall of Wood reverts to Bianca’s control.
Instance: Alex casts Bribery, which reads, “Search target opponent’s library for an animal card and place that card onto the battlefield using your control. Then that player shuffles his or her collection, ” targeting Bianca. Alex puts Wall of Wood on the battleground from Bianca’s library. If Bianca leaves the game, Wall of Wood additionally will leave the game. If, alternatively, Alex departs the game, Wall of Wood is exiled.
Instance: Alex manages Genesis Chamber, which reads, “Whenever a nontoken animal goes into the battleground, if Genesis Chamber is untapped, that creature’s operator sets a 1/1 colorless Myr artifact animal token onto the battlefield.” If Alex simply leaves the video game, all these types of Myr tokens that entered the battlefield under Alex’s control leave the video game, and all sorts of these types of Myr tokens that joined the battlefield under other player’s control stay in the video game.
800.4b. If an item would switch to the control of a new player having remaining the game, it cann’t. If a token would go into the battleground underneath the control of a new player who may have left the video game, no token is established. If a player is managed by a person who may have left the game, he or she isn’t.
800.4c If an object that would be had by a person who may have remaining the overall game would-be developed in any area, itsn’t created. If a caused ability that could be managed by a player who has got remaining the overall game could be placed onto the pile, itsn’t put on the stack.
Example: Astral Slide is an enchantment that reads, “Anytime a player cycles a card, you might exile target animal. Should you choose, return that creature to your battlefield under its owner’s control at the start of the second end step.” During Alex’s change, Bianca uses Astral Slide’s power to exile Alex’s Hypnotic Specter. Before the end of that turn, Bianca simply leaves the video game. At the start of the finish action, the delayed triggered ability produced by Astral Slide that could get back Hypnotic Specter to relax and play triggers, however it isn’t placed on the pile. Hypnotic Specter never ever comes back to the battleground.
800.4d. If combat damage would-be assigned to a person having remaining the video game, that harm just is not assigned.
800.4e. If an item needs a new player that has kept the game to create a choice, the controller associated with the item chooses another player to help make that option. If initial choice was to be produced by an opponent for the controller associated with the item, that player chooses another opponent if at all possible.
800.4f. If an impact calls for information about a specific player, the end result makes use of the present details about that player if they remains when you look at the game; otherwise, the end result makes use of the past known information regarding that player before he/she left the video game.
800.4g. If a person leaves the game during their turn, that turn consistently its conclusion without an energetic player. If active player would receive priority, instead the next player consequently order receives concern, and/or top object regarding stack resolves, or even the period or action ends, whichever is acceptable.
800.4h. Whenever a person will leave the game, objects that player owns in ante zone cannot keep the overall game. This is certainly an exception to rule 800.4a. See guideline 407, “Ante.”
800.4i. In a Planechase online game, in the event that player designated since the planar controller would keep the video game, alternatively next player consequently purchase that wouldn’t leave the video game becomes the planar controller, then your old planar controller leaves the game. See rule 309.5.
So, in your instance, that it is pretty straightforward:
Alex's Massacre Wurm is on the bunch. Bianca flashes inside her own Massacre Wurm (as a result of Vedalken Orrery or whatever). Alex doesn't have further response, therefore we resolve Bianca's Massacre Wurm. It comes into play and kills Alex's creatures, placing him at below 0 life.
Whenever Alex loses the game, their Massacre Wurm is still regarding pile. It simply leaves the video game directly from the bunch, without previously fixing. Poof!
When Alex loses the overall game, their Pacifism also simply leaves the game. Its impact on the animal it had been charming is gone, the same as if it absolutely was removed other means.
Here's the tricky component about these rules... suppose Alex also had an Oblivion Ring which he had previously used to exile Bianca's Liliana of this Veil. The O-Ring leaves the overall game, but will not trigger any effects with regards to does. Including a unique. So Bianca's Liliana remains exiled forever.
In addition, remember that, presuming it had been Alex's change when he passed away, the other players perform out of the rest of the phases without a dynamic player. If Bianca had some mana available and she desired to throw another enchantment before her very own change, by way of example, she could nevertheless do it on now-dead Alex's end action.