The main aspect of this deck is field control, all cards in this deck are either used to remove cards form the field, to prevent attacks or to pin down cards.
Guardian Statue can activate and flip summon, returning your opponent's monster back to their hand, enabling an easy direct attack.
Sergeant Electro is used to lock the opponent's spell/traps, which might be better than destruction since it clogs their backrow.
Special summon Lava Golem when you want to get rid of your opponent's monster. It's effective when used as a surprise, after your opponent has used up their resources to summon their monsters.
Using the skill
Use Paradox Brother's skill "Guardian Call" to get Guardian Statue from your deck. It can only be used once your LP is decreased by at least 1800. Useful if you don't get to draw any monster, but it can only be used once per duel. You can also reduce your own LP by using Mirror Wall. Activate it during your opponent's end phase, and pay the 2000 LP cost during your standby phase, allowing you to use the skill on main phase.
Activate Mirror Wall to halve the attack of your opponent's monster during battle. This would almost always destroy your opponent's monster if they attack into your Sergeant Electro, or any other monster with at least 1500 attack.
Wall of Disruption is very effective when your opponent has multiple monsters on the field. This will permanently reduce their attack, allowing you to deal almost direct damage if their attack goes down to 0. If you think your opponent has no higher level monster to tribute summon, you can also stall the duel by not destroying them so they can't summon new monsters.
Use spell/trap cards to protect your monsters and maintain control of the field.
Curse of Anubis can be used if your opponent activates Wall of Disruption when you attack. This will stop your attack, preventing you from taking damage and getting your monster destroyed.
Floodgate Trap Hole to flip your opponent's monster to face down. They won't be able to attack and activate their effect. Helps against powerful high level cards, or even Kaibaman, or Silent Magician LV4 so that they can't be used to special summon stronger monsters.
Other useful cards
For cards that can be used in any deck, check the link below.