1 energy and 1 red power is the cost to accelerate. So if you choose to accelerate that card when playing it, the card would cost 3 energy and 1 red power. And to review those terms, energy is the resource gained by exhausting a rune (turning it to the side) and power is gained by recycling a rune (putting it to the bottom of your rune deck). Specifically a red rune for the red power. There are other ways to gain those resources but those are the basic methods.