[LV1][LV2][LV3] (When Attacks) Discard one card from the top of the opposing deck.
Minor Release: 1 - [LV2][LV3] (Your Attack Step) Once per turn, when your opponent uses a card from their Hand, by sending one core from your "The Grandwalker Poseidon" to the Trash, immediately activate its [LV1][LV2] Grand Field, treating core as having been sent to the Void.