Able to Special Summon 1 level 4 Gishki monster from your Graveyard to the Field in Defense mode.
Effect can only be used once during Normal Summon.
Special Summoned monster is in DEF mode.
The main purpose of Gishki Beast is to swarm your Field with monsters, to either protect your Field or grant you enough tribute materials to Summon powerful higher level monsters.
You can also have Abyss Soldier on the Field to discard 1 level 4 or lower Gishki monster to return your opponent’s card back to their hand, and subsequently Normal Summon Gishki Beast to Special Summon the discarded Gishki monster back to the Field.
Gishki Beast’s effect allows you to have total of 2 WATER monsters on the Field, which in turn allows you to Special Summon Citadel Whale during the same turn. Citadel Whale is able to set Sea Stealth Attack directly from your Deck to the Field.