When this card is Normal Summoned: You can excavate the top 5 cards of your Deck, send any excavated Ritual Spell Cards and "Gishki" monsters to the Graveyard, also place the other cards on the bottom of your Deck in any order.
Aquamirror Meditation is able to return 2 “Gishki” monsters from your Graveyard to your hand, by revealing 1 Ritual Spell card from your Hand. Gishki Beast is able to Special Summon another level 4 or lower “Gishki” monster from your Graveyard to the Field. You can return Gishki Aquamirror to your Deck from your Graveyard, and retrieve 1 Ritual Monster from your Graveyard to your hand.
It is just for a meme. I like playing this against Vagabond's Mask Change. Dumping their spells in the grave while you recycle yours. Forbidden Arts of Gishki and SSA really works. I love this deck but not in Ranks.
My only concern is that it's a spellcaster instead of the other water ones like aqua, so mythic depths wouldn't help this card defend itself.