Flamecache Gecko

• WWizards of the Coast2024-07-26
  Official Ruling
  Flamecache Gecko’s first ability isn’t a mana ability. It uses the stack and can be responded to.
• WWizards of the Coast2024-07-26
  Official Ruling
  Flamecache Gecko’s ability cares whether an opponent lost life this turn, not how their life total changed. For example, an opponent who gained 2 life and lost 1 life in the same turn still lost life.

Rulings via Scryfall