Goddamned Bats / Collectible Card Game

• The likely Ur-Example in the CCG world is Magic: The Gathering and its plentiful different cards or card combos that let you spawn unlimited 1/1 or 0/1 token creatures. The original token-generating card was The Hive, which, in true Goddamn Bats fashion, generated flying creatures.
• Duel Masters has Pyrofighter Magnus, who comes out of nowhere, gets in a cheap shot, and disappears back to his owner's hand. You can only attack an opponent's monster on your turn, which means you can't kill him. If you have a blocker that can kill him, your opponent probably won't summon him, but he'll show up again once the blocker dies.
• Yu-Gi-Oh! also had them in the form of Spirit Reaper/Marshmallon and Treeborn Frog/Sinister Serpent. The first two cannot be destroyed in battle, and have weak enough stats to make them safe from most of the popular monster-destruction cards, while the latter two are easily able to return to your hand/field shortly after being sent to your graveyard, no matter how they're sent there. Fortunately for players, Spirit Reaper dies the moment an effect targets it, only one Treeborn Frog can be summoned per turn via its effect, and Sinister Serpent is outright banned. Marshmallon had the consolation of being limited to two per deck until September 2012; now it is again subject only to the Rule of Three. There's also Tsukuyomi (a Spirit monster that flips a monster on the field face-down upon summoning, and bounces back to your hand at the end of the turn), and Yata-Garasu, a Game-Breaker if there ever was one. With the ability to prevent the opponent from drawing cards normally and the ability to return to its owner's hand due to it being a Spirit-type, it was essentially an "I win" card that still causes eye twitches when mentioned around seasoned Yu-Gi-Oh! players. Yata-Garasu was actually partly responsible for the Forbidden/Limited List's creation, and was banned until 2022. Tsukuyomi was likewise...until September 2012, when it's been limited to one per deck. And that's more than enough.
• KanColle: Tsu-class light cruisers aren't that powerful or tough, but their ability to do Anti-Air Cut-Ins will destroy large numbers of your bombers, greatly weakening your carriers' offence.
• Taunt minions with Divine Shield in Hearthstone: Heroes of Warcraft. Most of them have non-threatening stats, but they will require in general, two hits to take down, giving your opponent's heavy hitter time to get ready to attack. The most iconic is Annoy-O-Tron. A 1/2 stat is hardly threatening, but it has been known to stop two Deathwings dead in their tracks.

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