Lignify

• WWizards of the Coast2007-10-01
  Official Ruling
  Lignify overwrites previous effects that changed the enchanted creature's creature types. Any such effects that apply after Lignify enters will work normally.
• WWizards of the Coast2007-10-01
  Official Ruling
  If a previous effect switched the creature's power and toughness, that effect still applies (though it will apply to the creature's new power and toughness).
• WWizards of the Coast2007-10-01
  Official Ruling
  Lignify will overwrite static abilities that come from the creature itself (such as the one on Verduran Enchantress) because Lignify causes the creature to lose that ability before it gets a chance to apply.
• WWizards of the Coast2007-10-01
  Official Ruling
  If Lignify leaves the battlefield, the creature goes back to being what it was before. Any effects that applied while the Lignify was on the battlefield, such as Giant Growth or Lace with Moonglove, will continue to apply.
• WWizards of the Coast2007-10-01
  Official Ruling
  If the enchanted creature has a characteristic-defining ability that specifies its color, that ability will still have its effect because it's applied before the creature loses the ability.
• WWizards of the Coast2007-10-01
  Official Ruling
  Lignify overwrites characteristic-defining abilities that specify the enchanted creature's power or toughness (such as the one Dauntless Dourbark has) or that specify its creature types (such as changeling does).
• WWizards of the Coast2007-10-01
  Official Ruling
  Lignify causes the enchanted creature to lose all abilities it had at the time it became enchanted. Any abilities granted to the creature after Lignify entered the battlefield will work normally.
• WWizards of the Coast2009-10-01
  Official Ruling
  Lignify will overwrite any previous effects that set the enchanted creature's power or toughness (such as Serendib Sorcerer does). Any such effects that apply after Lignify entered will work normally.
• WWizards of the Coast2009-10-01
  Official Ruling
  Lignify will not overwrite effects such as those from Glorious Anthem, counters, or Giant Growth that change the enchanted creature's power or toughness without setting it to a specific value. Apply such effects after applying Lignify.
• WWizards of the Coast2024-06-07
  Official Ruling
  This cards was originally printed with the "tribal" card type. That card type has been replaced with "kindred". This change does not affect the gameplay function of this card.
• WWizards of the Coast2024-06-07
  Official Ruling
  While it appears only on cards that already have other card types, kindred is a card type and will be counted by effects that refer to the number of card types among cards in a zone.
• WWizards of the Coast2024-06-07
  Official Ruling
  Kindred is a card type that allows noncreature cards to have creature types. For example, Echoes of Eternity is an Eldrazi (although not a creature) while on the battlefield and an Eldrazi card (although not a creature card) in zones other than the battlefield.

Rulings via Scryfall