Lifening Elemental

• WOTC Official Reminder Textofficial rules
  Lifelink — Damage dealt by this creature also causes you to gain that much life.

• WWizards of the Coast2024-11-08
  Official Ruling
  If the spell is countered or otherwise fail to resolve, any cards you spliced onto it remain in your hand.
• 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
  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
  If a spell is copied, choices made while casting it are copied, so the copy will have the same abilities spliced onto it as the original.
• WWizards of the Coast2024-11-08
  Official Ruling
  Splicing Lifening Elemental onto an instant or sorcery will give it lifelink. It won’t make that instant or sorcery spell a creature spell, nor give it a power or toughness.
• 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
  You reveal all cards you intend to splice at the same time. Each individual card can be spliced only once onto any one spell, although multiple cards with the same name may be spliced onto one spell.
• WWizards of the Coast2024-11-08
  Official Ruling
  If all of the spell’s targets are illegal when the spell tries to resolve, it won’t resolve and none of its effects will happen, including those from cards spliced onto it.

Rulings via Scryfall