Posioned Pawn

The Poisoned Pawn Variation is any of several series of opening moves in chess in which a pawn is said to be "poisoned" because its capture can result in a positional loss of time or a loss of material.

Aizawa-sensei had knocked on Izuku's door in the bright, early morning hours. Izuku had just gotten back from a run and he was sweaty and ready for a shower, but when he had opened his door to find his usually asleep teacher, he had not even questioned it. He had not even questioned it when said teacher had growled at Izuku to come with him and started walking, Izuku scrambling to keep up.