Shark

Unlike many WATER Fish strategies that sit at Level 4 and funnel straight into rank 4 toolboxes, the Shark archetype deliberately spans Levels 3, 4, and 5, giving it unusual flexibility across the Xyz Summon ladder. Veiss Shark is one of the deck's most important Normal Summons — tributing any Fish monster on arrival to search a Fish Shark directly from the Deck, setting up fields that can range from Shark Caesar stacking Shark Counters on repeated attacks to Shark Fortress granting a second attack to a chosen ally while drawing all opposing attacks to itself. Crystal Shark and Drake Shark extend these lines further: Crystal Shark halves a friendly WATER monster's ATK to Special Summon itself from the hand or Graveyard and can be counted as Level 3 or 4 when used for a Number Xyz, while Drake Shark arrives automatically whenever it is added to the hand outside a draw and can count as two materials for a WATER Xyz requiring three or more, making Number C32: Shark Drake Veiss substantially easier to summon.

The deck recovers well between turns. Cutter Shark pivots a targeted monster into a free Special Summon of itself and then returns a WATER monster from the Graveyard to hand during the End Phase, and Hydrojet Shark extends boards by Special Summoning from hand whenever a WATER Xyz is already on field, while also loading the Graveyard with Fish Shark monsters or Xyz Spell/Traps. Dream Shark adds a further resilience layer, able to self-summon from the Graveyard the moment an effect would deal damage, converting that damage to zero. This mixture of self-replacing monsters and material manipulation means the archetype can frequently rebuild after disruption and threatens consistent Xyz plays across multiple battle phases.