Select two of your opponent's monsters with this card, then suicide one of your monsters to destroy two of your opponent's monsters with one attack. Use cards that can Special Summon other monsters so you can attack directly. Good recommendations are "Mystic Tomato", "UFO Turtle" or "Masked Dragon".
This card can also be used as defensively when your opponent attacks your weaker monster with a stronger monster.
You can use this card to select one monster on your field, and one monster on your opponent's field you wish to destroy. You can then use the selected monster for a Synchro Summon or Normal Summon and destroy your opponent's monster. Alternatively You can suicide you weaker monster into the stronger monster and destroy them both.
You can enable or prevent "Yubel" from being destroyed through this card's effect by selecting "Yubel" and one other monster on the field. Your opponent will then have to avoid having that second monster destroyed to prevent "Yubel" from leveling up.
Even better, trigger the "Dud"'s destruction, and thus the leveling up of "Yubel", yourself. Select a monster you control and "Yubel". When "Yubel" tributes that monster during the end phase, "Dud" will be destroyed.
Use when your opponent summons one "Gladiator Beast Gyzarus" while you have two cards on the field, this one and another attack position monster. They select your two cards, you activate "Widespread Dud", destroying their "Gyzarus" in the process.
Alternatively, this card can prove to be effective in a "Gladiator Beast" deck. By selecting one of your monsters that is going to tag out and an opponents, you can clear the field of one of their monsters. This can prove to be a good strategy against "Stardust Dragon" as it cannot negate this card's effect.
This is also used well against Demise, King of Armageddon. If your opponet activates his effect, chain with this and select any monster and Demise to reset the feild.
You can use this card when your opponent activates "Judgment Dragon's" destruction effect, assuming there is at least one other attack position monster on the field. After the resolution of "Judgment Dragon's" effect, the field will be completely clear.
Target your opponent's "Stardust Dragon" and one other attack position monster on their field with this card. Not only is "Stardust Dragon" unable to negate this card's effect, if your opponent uses their "Stardust Dragon" to negate another one of your cards they lose their other monster as well.
You can use this card on your opponent's "Shooting Star Dragon". While in attack position, use a monster's effect that would prove difficult for your opponent to ignore and allow, they will in turn use "Shooting Star's" effect to negate it, starting a Chain. In response, you can chain this card to the monster who's effect is being negated, selecting it and your opponent's "Shooting Star Dragon". When the chain resolves, your opponent will have destroyed their monster along with yours.
This card works well with "Scrap Dragon", that you can destroy three of your opponent cards.
In decks that run destruction cards, such as Gadgets, select two of your opponent's monsters and activate "Smashing Ground" or "Fissure" to trigger "Widespread Dud" and clear the field.
You can use this card on 1 monster you control (and 1 that your opponent controls) when your monster is about to be destroyed, making an immediate destruction.
This card works well with "Cyber Shadow Gardna". If it is not destroyed on your opponent's turn, this card will be destroyed when "Gardna" is Set, thus whatever other monster you Targeted will be destroyed also.