Energies:
Energies function similarly to MTG mana, but there are no dedicated Energy cards. Energies are any card you play upside down from your hand into the Energy zone.
Energies do not conduct combat.
Energies can be used to pay for cards and energize your Avatar, giving access to powerful Avatar effects.
Cards give Energy color corresponding to their color. So a Blue card gives Blue Energy. A Green card (a fren) gives Green energy.
Energy removal is one of the most expensive and restricted effects in the game.
Transmutation of Energies is one of the most powerful effects in the game, because it allows you to play (invert/turn right side up) an Energy from your Energy zone. You basically get a free card at the cost of an Energy. See more on Transmutation.
