I've got a couple of examples, although I haven't studied them much:
Avatars are made like "Name [Clan] [Class] [Attack] [Defense] [Minumum Energy]: Ability
-Tornado, the Hurricane-Caller [Wind] [Spirit] [1500] [1500]
- : Use 4 Energy: return all of the Equipments on the field to their owner's hand. Neither Avatar can be destroyed on the turn you activate this Ability.
-Weapons Bearer [Earth] [Warrior] [1000] [1800]
- : Once per turn: equip one Equipment from your deck and, if it has a cost, pay it (this Avatar must be a legal target for the Equipment you pick).
Energy Cards are made like "Name [Energy Card (this specifies that this card is an Energy Card] [Clan]: Effect
(some glossary: used means that it is discarded from the Energy Gauge for the activation or the Effect of a card)
-Cyclic Energy [Energy Card] [Neutral]: If this Energy is used: during your next turn, you can charge your Energy Gauge with an Energy Card from your deck instead of drawing during your Draw Phase.
-Burning Energy [Energy Card] [Fire]: If this Energy is used: destroy a card on the field but you cannot attack on this turn, unless this Energy was used by a Fire Avatar.
-Kinetic Energy [Energy Card] [Neutral]: When your Avatar attacks: you can use this card: increase that Avatar's Attack by 200 for each Equipment it has.
Equipments are made like "Name [Equipment (this specifies that this card is an Equipment] [Clan] [Boost]: Effect
-Shinigami's Sword [Equipment] [Darkness] [+500 Attack]: When your Avatar wins a battle: use 1 of your opponent's Energy.
-Aegis's Shield [Equipment] [Earth]: When your Avatar loses a battle: you can use 1 Energy to prevent the destruction of an Equipment due to the battle.
Instants are made like "Name [Instant (this specifies that this card is an Instant]: Effect
-Energy Back! [Instant]: Charge your Energy Gauge with up to 2 Energy Cards from your discards.
-Hidden Armory [Instant]: Equip one Equipment from your deck.
Traps are made like "Name [Trap (this specifies that this card is a Trap]: Effect
-Enemy Field [Trap]: When your opponent's Avatar attacks: it loses 500 Attack and 500 Defense until the end of your next turn.
-Heavy Weight [Trap]: When your opponent's Avatar's Defense increases and that Avatar's Defense is higher than its Attack: it cannot attack until it has an higher Defense. (Basically, you can activate it only if that Avatar's Defense increases and after that it is higher than its Attack, even if it was higher to start with)
-Energy Drain [Trap]: When your opponent charges his/her Energy Gauge: use 1 Energy: charge your Energy Gauge with the Energy Cards your opponent has just charged with.
Hope I gave an idea of what I mean.
Don't ask me about those dots with the Avatars, I don't know.ow.