How can you tell your card is this one?

Look at the bottom of your card: you should read SM8b 145 there.

SM8b

Wondrous Labyrinth ◇ SM8b 145

SM8bKORare Holo

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How can you tell your card is this one?: Look at the bottom of your card: you should read SM8b 145 there.
Which set does it come from?: It comes from the SM8b set.

Its characteristics and effects in play, with the original text when available.

The Korean text is not available yet. Text shown: Japanese.

おたがいの場のポケモン（[妖]ポケモンをのぞく）が使うワザに必要なエネルギーは、それぞれ[無]エネルギー1個ぶん多くなる。このスタジアムは、場に出ているかぎり、おたがいのプレイヤーが手札からグッズまたはサポートを出して使ったとき、その効果を受けない。