The "Danger!" monsters are based on cryptids, animals of questionable existence, from around the world.
|Monster||Origin||Effect when discarded|
|Bigfoot!||Bigfoot||You can target 1 face-up card your opponent controls; destroy it.|
|Chupacabra!||Chupacabra||You can target 1 "Danger!" monster in your GY, except "Danger! Chupacabra!"; Special Summon it.|
|Dogman!||Dogman||You can have all face-up monsters your opponent currently controls lose 1000 ATK until the end of this turn.|
|Mothman!||Mothman||You can have both players draw 1 card, then both players discard 1 card.|
|Nessie!||Loch Ness Monster||You can add 1 "Danger!" card from your Deck to your hand, except "Danger! Nessie!".|
|Ogopogo!||Ogopogo||You can send 1 "Danger!" card from your Deck to the GY, except "Danger! Ogopogo!".|
|Thunderbird!||Thunderbird||You can target 1 Set card your opponent controls; destroy it.|
|Jackalope?||Jackalope||You can Special Summon 1 "Danger!" monster from your Deck in Defense Position, except "Danger!? Jackalope?".|
|Tsuchinoko?||Tsuchinoko||You can Special Summon this card.|
All "Danger!" monsters have the following effect pattern:
You can reveal this card in your hand; your opponent randomly chooses 1 card from your entire hand, then you discard the chosen card. Then, if the discarded card was not [its own name], Special Summon 1 [its own name] from your hand, and if you do, draw 1 card. If this card is discarded: You can [...]. You can only use this effect of [its own name] once per turn.
The strategy consists in the "Danger!" monsters revealing themselves in their owner's hand to activate their effects, then "hiding" in the hand again, making the opponent randomly discard a card from their opponent's hand. If they fail to "catch" the "Danger!" monster, the monster is Summoned and a card is drawn, possibly also activating an effect if another "Danger!" monster was caught and discarded. If they do "catch" the "Danger!" monster, it triggers its discard effect, which varies from Special Summoning a "Danger!" monster from the Deck to destroying a card on the field. As such, the competitive potential of the Deck lies in the fact that activating a "Danger!" monster's effect will only rarely be a disadvantage to their user. Summoning several "Danger!" monsters in a turn isn't difficult and they can quickly perform an OTK, especially when combined with other archetypes, such as "Dark World" and "Fabled", whose effects activate when they are discarded.
As their effects work only in the hand or in the Graveyard, they're weak to commonly-used cards such as "Abyss Dweller", the often Side-Decked card "Shadow-Imprisoning Mirror", and less-seen cards like "Debunk" or "Skull Meister". In the same way, the archetype is vulnerable to cards like "Macro Cosmos" and "Dimensional Fissure", that banish their monsters.
Because the monsters have to reveal themselves in the hand, cards like "Ceremonial Bell" and "Respect Play" can seriously disrupt this Deck's strategy, because they simply reveal the monsters so their owner can no longer reveal them by their own effect. Also because the Deck revolves around Special Summoning, cards such as "Vanity's Fiend" and "Vanity's Ruler" can also impede the Deck by preventing you from Special Summoning.
The Deck is, to some extent, luck-based. If the random card discarded by the opponent is not a "Danger!" monster, this can hamper the Deck's overall consistency; however, this can be alleviated by including "Dark World" and/or "Fabled" monsters in the Deck. Also, losing a Hand trap could be a problem, so the Deck cannot rely on them as consistently as other strategies.