Bridge from Below

• WWizards of the Coast2018-12-07
  Official Ruling
  If Bridge from Below isn't in your graveyard immediately before a creature dies, its abilities won't trigger at all. If Bridge from Below isn't still in your graveyard as its first ability resolves, you won't create a token.
• WWizards of the Coast2018-12-07
  Official Ruling
  While Bridge from Below is on the battlefield, it has no effect. It does something only if it's in a graveyard. Yes, this is a bit weird.
• WWizards of the Coast2018-12-07
  Official Ruling
  If a nontoken creature you control and a creature an opponent controls die at the same time, you choose the order in which Bridge from Below's triggered abilities resolve. You can create a token before you exile Bridge from Below.
• WWizards of the Coast2018-12-07
  Official Ruling
  Neither ability cares who controlled the creature that died, only which graveyard it was put into. This means that if an opponent controls a creature you own, its death causes Bridge from Below's first ability to trigger, not its second.

Rulings via Scryfall

• WO
  Wizards of the Coast2019-07-08 · edited

  Bridge from Below was banned in modern on July 8, 2019. The Hogaak Bridgevine deck, centered around Bridge from Below, has shown a high overall win rate and warped the Modern metagame. We identified Bridge from Below as the card most likely to cause metagame imbalance again in the future because it doesn't cost mana or other resources to use and isn't reliant on being drawn naturally from the library. Source: https://magic.wizards.com/en/news/news/july-8-2019-banned-and-restricted-announcement-2019-07-08