You're banned!
This is hardly a choice, more of a murder of the opponent the moment it's activated.
Painful Choice
True Draco
Dragonic Diagram
Spright's best Normal Summon
Nimble Beaver
Adventurer Token
Rite of Aramesir, Curse of Aramatir
Has a Toon form and is the biggest offender for FTKs
Cannon Soldier
Shaped how people viewed deckbuilding with a change in numbers.
Traptrix
Traptrip Garden
I feel bad for Aussa for just trying to say this name
Nefarious Archfiend Eater of Nefariousness
Insect Monster Token
Insect Queen, Metamorphosized Insect Queen
Isolde Box's best card allowing for a ton of discards. It is banned in the OCG and Master Duel because of that.
Divine Sword - Phoenix Blade
It's Flunder before Flunder
Ultimate Offering
Gate Guardian
Labyrinth Wall Shadow
Marik possessing his servant strings thought he was so cool playing this infinitely worse Swords of Revealing Light.
Nightmare's Steelcage
Dark Soul Token
Dragonecro Nethersoul Dragon
Able to be made with more than 1 Tuner, this EARTH monster has seen play here and there due to its hand ripping effect that is not a soft once per turn at all.
XX-Saber Gottoms
Could quite literally Special Summon any monster from the Deck, with the restriction that its effects are negated, great card design Konami.
Summon Sorceress
Daily Double. Ninja
Tenchi Kaimei, Hidden Village of Ninjitsu Arts
People used this during Tear format to make it the End Phase
Neko Mane King
Dragon Lord Token
Ruins of the Divine Dragon Lords
Before its errata, this card was responsible for a kid being on stream and getting FTK'd to which he could do nothing about it.
Firewall Dragon
Printed at a time where Substitoad was already quite good even without Ronintoadin existing, this card was infinitely better in that it didn't Special Summon an archetypal monster with its tribute effect that was not even a soft once per turn. It eventually got an errata that literally made it to where it just couldn't tribute itself for its own cost.
Mind Master
Metalfoes (There Metal I gave you 1 question)
Metamorformation
One of the Worst card series of all time. It was so bad that they only printed 2 out of the 6 monsters for it. The card I want you to guess, is the card that Summons the things.
NEX
Engine Token
Fiendish Engine Ω
This is one of the few Link Monsters left in the game where its effect is not a soft once per turn at all that's still legal, and believe me it was responsible for several FTKs, but instead of banning this cyberse monster with an identity crisis, they instead banned the burn cards.
Topologic Bomber Dragon