It's level two ability, which costs an additional three mana to trigger, sees you gain two life any time a creature with a counter on it leaves the battlefield
Here is an overview of the treatments available within MTG Arena
during your Main Phase this turn, you can conduct 1 Pendulum Summon of a monster(s) from your hand in addition to your Pendulum Summon
Since it's a creature, you can re-use its ability easily by bouncing it (Riptide Laboratory) or blinking it (Momentary Blink) for another surprise
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The YJ auctions ends at: Seller Rate/Feedback This limited edition Gengar Pokmon card from the 1998 Communication Evolution Campaign remains a highly sought-after piece, particularly among fans of the first-generation series, where Gengar has continuously held a strong appeal