green energy pokemon card - Grass 278/193 - Paldea Evolved Listed cards may have imperfections. Grass Energy Prices | Grass

Youll often see abilities that animate an artifact and give it power and toughness that correlate with its mana value, while other abilities give the artifact a specific power and toughness (most Tezzeret planeswalker cards, for example)

Life Insurance is certainly something

Its a way to get free mana from a card in your hand that you can turn into more mana with cards like Manamorphose or Pyretic Ritual

You are much better off trying to kill it

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Adding a sacrifice outlet to your mana base makes it much stronger than it would be if it was just lands that tapped for mana, especially considering how hard it is for your opponent to interact with it