"Underdog" Rating Score by えいてぃ

Something like Skidre, but not Skidre, with all the good parts of Skidre removed in exchange for the LP cost.
It negates the effects of monsters on the opponent's field each turn, so it's a card that allows you to move without worrying about the opponent's board during the effect function, but the same goes for your opponent.
Unlike Skidre, activating it during the opponent's turn doesn't interfere with anything, and you only carry the disadvantage, so you have to wait until your next turn after setting it to make it actually work. If you can close your eyes to its slowness, it will help you.
Of course, even if you can activate it, it doesn't mean you can trust it completely, and Spell Trap and hand triggers work well, so you have to swallow them.
There are almost no monsters that would be happy to have their effects negate only during the opponent's turn, so its design is completely different from Skidre. His deck, which can be used satisfactorily, is also very different. Whether or not you can make use of this effect depends on your build, but considering how slow it is, I can't deny that he's a little underpowered as a single piece of Continuous Trap.