Kozilek, Compleated

• WWizards of the Coast2024-11-08
  Official Ruling
  Playtest cards use a modified version of game symbols, such as and . These modified symbols should be treated as the standard symbols during play.
• WWizards of the Coast2024-11-08
  Official Ruling
  For many playtest cards, you’ll need to make a generous assumption that basic game rules would be updated to allow them to work. The Mystery Booster 2 Playtest Card Notes section (reproduced here in individual Gatherer rulings) provides guidance for fitting these cards into the existing rules structure.
• WWizards of the Coast2024-11-08
  Official Ruling
  Annihinfect abilities trigger and resolve during the declare attackers step. The defending player chooses and sacrifices the required number of permanents before they declare blockers. Any creatures sacrificed this way won’t be able to block.
• WWizards of the Coast2024-11-08
  Official Ruling
  Playtest cards aren’t legal for play in any tournament format other than Mystery Booster Limited formats. On the other hand, we expect they will spice up a wide variety of non-tournament games (as long as everyone’s on the same page about using them!).
• WWizards of the Coast2024-11-08
  Official Ruling
  If a creature with annihinfect is attacking a planeswalker, and the defending player chooses to sacrifice that planeswalker, the attacking creature continues to attack. It may be blocked. If it isn’t blocked, it simply won’t deal combat damage to anything.
• WWizards of the Coast2024-11-08
  Official Ruling
  Kozilek’s first ability will resolve before Kozilek does. If Kozilek is countered or otherwise leaves the stack in response to that triggered ability, the triggered ability will resolve as normal.
• WWizards of the Coast2024-11-08
  Official Ruling
  The number of cards each opponent discards is calculated as Kozilek’s first ability resolves. If an opponent has two or fewer cards in their hand at that time, they won’t discard any cards.

Rulings via Scryfall