The Shoal Cycle is a horizontal cycle of cards named "Shoal" and depicting a group of fish (a shoal) in the artwork. They are also all costed XCC and a scalable effect. They are also all Pitch Spells and as such can be played without paying the mana cost by instead removing a card in hand from the game. In this case the converted mana cost of the removed card sets X in the shoal's effect. Also they share the subtype Arcane.
The cards in the cycle are: