Haos is all about low-G bakugan. The lower the Gs, the better. Why? Because there are so many Haos-themed cards that help them totally overpower higher-G bakugan!

For a basic example, take a look at copper gate G-Power Swap and the bonus it gives to Haos. Not only do the two bakugans' printed G-powers get swapped (Haha Darkus Hades, now I'M 710G and you're not!) but it also shares the highest bonus with Subterra at 130G. Either way, if your bakugan has a printed G-power of around 200-300, your opponent's going to be really struggling to try to win a battle on this card, especially if you throw in blue card Copper Boost, which gives an 80G bonus to Haos, doubled to 160G for being played during a battle on a copper gate.

Gold gate Ethereas and copper gate Mirror Gate also give bonuses to low-G bakugan. With Ethereas, the bakugan with the lowest G-power gets +50 G-power for each other gate card on the field (and there are cards like green ability Super Quake that can get more than 2 cards on the field) when the battle is taking place. On Mirror Gate, the owner of the bakugan with the lowest G-power gets to put any ability card they play this turn back into their hand when the battle is over.

Take a look at gold card Energize. Haos strategy often involves playing ability cards. If you have to use a couple to win a battle early on, this card will allow you to put one of them back in your unused pile. Plus, it gives a 210 bonus to Haos!

In order to use some killer ability cards, your opponent needs to have at least one gate card in their used pile. What if they won that battle on copper gate High Voltage, which forces the player who wins by more than 100G to put all their ability cards into their used pile? Darkus brawlers won't be able to shut you down with their ability-blocking strategies, Aquos brawlers won't be able to get you where they want you, and Ventus brawlers can say goodbye to having any control over the field, when they can't play any ability cards for the rest of the game!

Copper gate Magma Fields doubles the G-power bonus that the lowest-G bakugan gets from any G-power boost cards that its owner plays during the battle. Try this with blue ability Heavy Hand, which offers a 100G bonus to Haos, and gets upped to 300G when your opponent is using Darkus! You can even combine it with green ability Shiny Devil, which offers a 400G bonus to a Haos bakugan who is getting trumped by a printed G-power of 200G or more! Combined with the 130G attribute bonus from the gate, that's a total G-power bonus of 1530G against Darkus!! (Can you say overkill?)

Reclaim is a new silver gate that allows anyone with a Haos or Darkus bakugan to move a red ability card from their used to their unused pile when the battle is over. That can be any red ability card that you've played over the course of the game! Alternately, silver gate Reuse allows you to do the same, only with a blue ability card.

Don't forget about copper gates like Blinding Gate, Duck & Win, Limbo Gate, Low Bridge, Needle's Eye,  Overhang, Quick Sand, and Tricky Gate; they all make it so that the bakugan with the lowest total G-power wins the battle. Combine this card with green ability card Haos 2, which allows you to move a gate card from your opponent's used pile to your own, so long as your Haos bakugan is getting beat by 160G or more. This gives you 2 gate cards in one battle!

Speaking of ability cards...

Red ability Rip Tide is played at the start of your turn if your opponent has more used gate cards than you. So long as it stays in your used pile, you can reroll a Haos or Aquos bakugan once per turn.

Red card Flames of Light allows you to directly place a Haos or Pyrus bakugan on a gate card after your opponent manages to roll and stand a bakugan on that card, so long as it was empty before they rolled.

Red card Light Wind is played after you roll and stand a Haos or Ventus bakugan. Afterwards, you can move any standing bakugan to any gate card.

Not sure what red ability card you'll need? Use red card Learn from Experience. After you lose a battle with a Haos or Pyrus bakugan, you'll be allowed to go through your card collection and add a new red card to your unused pile. This is really handy for plotting out your endgame strategy, especially since you need to lose at least one battle to be able to play cards like Haos 2, and because you'll need for your opponent to have more used gates than you in order to get the bonus from certain gates and ability cards.