You can Ritual Summon this card with any "Gishki" Ritual Spell Card. Once per turn: You can declare 1 card type (Monster, Spell or Trap); your opponent can discard 1 card to negate this card's effect, otherwise both players send 1 card of the declared type from their Main Deck to the Graveyard.
Gishki Aquamirror is currently the best Ritual Spell card for Gishki ritual monsters. It can recycle itself from the Graveyard to your Deck, at the same time you can also recycle 1 Ritual monster from the Graveyard back to your Hand as well. Forbidden Arts of the Gishki is a powerful Ritual Spell card to use your opponent’s monsters as tributes for your Ritual Summoning instead, but the drawback is your Ritual Monster’s ATK is halved and you cannot conduct Battle Phase during the same turn.
Gishki Ariel has Flip effects that searches for any “Gishki” monsters from your Deck to your Hand, this includes Evigishki Tetrogre. Gishki Natalia has effects that target 1 “Gishki” monster in your Graveyard and return it to your top Deck, this includes Evigishki Tetrogre. Aquamirror Meditation can return 2 “Gishki” monsters from the Graveyard to your hand, this includes Evigishki Tetrogre.
As all Gishki monsters are WATER attribute, those level 5 or higher Ritual monsters can benefit from Sea Stealth Attack effects. This greatly enhance their combat ability to play around cards like Wall of Disruption since Gishki decks generally lack the cards to deal with opponent’s backrow. You can use Moray of Greed to shuffle 2 WATER monsters from your hand to your Deck and draw 3 cards.
Starting to see the theme here! one ritual returns 5 cards from your grave to the deck, the other draw 1 and if its a gishi monster search out a card from your opponents hand and then this to discard it! looks like a fun deck to try!