Error:

AUTO: When this unit is placed on (GC), if it is during the battle in which your opponent’s grade 2 or less vangaurd attacked, choose one of your 《Oracle Think Tank》 that is being attacked, and that unit cannot be hit until end of that battle.

Correct:

AUTO: When this unit is placed on (GC), if it is during the battle in which your opponent’s grade 2 or less vanguard attacked, choose one of your 《Oracle Think Tank》 that is being attacked, and that unit cannot be hit until end of that battle.