You can Ritual Summon this card with any "Gishki" Ritual Spell Card. When this card declares an attack: Draw 1 card, and if you do, reveal it, then if it was a "Gishki" monster, look at 1 random card in your opponent's hand.
Allows you to draw and reveal 1 card when this monster battles.
If the revealed card is a monster, you can look 1 random card in your opponent’s hand.
Must attack to trigger this card’s effects.
Requires exact level of tribute materials for Ritual Summon.
By discarding Gishki Vanity you can potentially prevent your opponent from using cards like Curse of the Forbidden Seal and Floodgate Trap Hole that can disrupt your Ritual Summons.
The challenge of Ritual Summons for Gishki is that all the Ritual Spells require exact level of Tributes, so your monster choices for level 6 and level 8 Ritual monsters summons can pose to be a hindrance.
Alternatively, you can also use Senju of the Thousand Hands to search for Gishki Ritual monsters from your Deck.
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 Levianima. Gishki Natalia has effects that target 1 “Gishki” monster in your Graveyard and return it to your top Deck, this includes Evigishki Levianima. Aquamirror Meditation can return 2 “Gishki” monsters from the Graveyard to your hand, this includes Evigishki Levianima.
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.
You realise you can use multiple cards to ritual summon, right?
I've made a deck around it and it's easily summoned. It's a reliable and consistent card the only issue is that SSA screws Gishki's and SSA is meta at the moment. I would say Water Cluster Dragon is the worst UR in this set.