Yu-Gi-Oh! Aspischool - Alliance Insight (ALIN)

When this card is Normal Summoned: You can Special Summon 1 Level 6 or lower Fish monster from your hand in Defense Position, but banish it when it leaves the field. If this card is banished: You can Special Summon this card in Defense Position. You can only use this effect of "Aspischool" once per turn.