"Paving a Way for the Future" Armin (AOT/S35-E006 R) [Attack on Titan]

[AUTO][(1)] When this card attacks, if a card named "Since That Day" is in your climax area, you may pay the cost. If you do, until the end of your opponent's next turn, this card gets +2000 power and the following ability. "[AUTO] At the beginning of your opponent's attack phase, you may choose one of your {Corps} characters and this card, and exchange them as STAND."