• You can easily Summon this card in a "Mermail" Deck using 2 Level 3 "Mermail" monsters and then using "Lemuria, the Forgotten City" to raise their Levels to 5.
    • "Lemuria" may also be used in a "Nimble" Deck that focuses on the WATER "Nimble" monsters ("Angler", "Sunfish" and "Manta") as you can Summon 3 of them with little effort. Activate "Lemuria" and all 3 Level 2 monsters will become Level 5, then you can overlay two of those for "Crystal Zero".
  • Note that unlike "Number 73: Abyss Splash", this monster's effects can be used multiple times per turn– even on the opponent's turn or on the same monster. Also unlike "Abyss Splash," whose effects end during the opponent's turn, the ATK of "Crystal Zero" changes last until its owner's End Phase– a detail which can be used to debilitate an opponent's monster for extended periods of time if the effect is triggered during the enemy's turn.
  • You can Xyz Summon this card by first using the effect of "Instant Fusion" to Fusion Summon "Sea Monster of Theseus", and then Tributing it to Tribute Summon "Salvage Warrior". Use the effect of "Salvage Warrior" to Special Summon "Sea Monster of Theseus" from your Graveyard, and then overlay the two monsters to Xyz Summon this card.


  • Level 5 WATER monsters that can be used as Xyz Material:
 Japanese namePrimary typeSecondary typeTypeATKDEF
30,000-Year White Turtle3万年の白亀Normal MonsterAqua12502100
AkihironカクタスNormal MonsterAqua17001400
Amphibious Bugroth水陸両用バグロスFusion MonsterAqua18501300
B.E.S. Crystal Core巨大戦艦 クリスタル・コアEffect MonsterMachine21001000
Blue Dragon Ninja青竜の忍者Effect MonsterSea Serpent21001200
Bolt Escargotボルト・エスカルゴNormal MonsterThunder14001500
Bottom Dweller神魚Normal MonsterFish16501700
Catapult Turtleカタパルト・タートルEffect MonsterAqua10002000
Cloudian - Nimbusman雲魔物-ニンバスマンEffect MonsterFairy10001000
Crystron Ametrix水晶機巧-アメトリクスSynchro Monster
Effect Monster
Crystron Sulfefnir水晶機巧-サルファフナーEffect MonsterMachine20001500
Cyber Sharkサイバー・シャークEffect MonsterFish21002000
Deepsea Shark深海に潜むサメFusion MonsterFish19001600
Deepsea Warrior深海の戦士Effect MonsterWarrior16001800
Depth Sharkデプス・シャークEffect MonsterFish14000
Des FrogデスガエルEffect MonsterAqua19000
Dinomist Brachionダイナミスト・ブラキオンPendulum Monster
Effect Monster
Dinomist Ceratopsダイナミスト・ケラトプスPendulum Monster
Effect Monster
Dinomist Rexダイナミスト・レックスPendulum Monster
Effect Monster
Dinomist Spinosダイナミスト・スピノスPendulum Monster
Effect Monster
Divine Dragon Aquabizarre神竜アクアバザルEffect MonsterSea Serpent21001500
Dragon Iceドラゴン・アイスEffect MonsterDragon18002200
DuoterionデューテリオンEffect MonsterDinosaur20001400
Eagle Sharkイーグル・シャークEffect MonsterFish10001800
Elemental HERO MarinerE・HERO セイラーマンFusion Monster
Effect Monster
Elemental HERO Steam HealerE・HERO スチーム・ヒーラーFusion Monster
Effect Monster
Emperor of the Land and Sea水陸の帝王Normal MonsterReptile18001500
Exa, Enforcer of the Nekroz影霊衣の戦士 エグザEffect MonsterDragon20001000
Frozen Fitzgerald氷結のフィッツジェラルドSynchro Monster
Effect Monster
Gazer Sharkゲイザー・シャークEffect MonsterFish10001900
Giant Turtle Who Feeds on Flames炎を食らう大亀Normal MonsterAqua14001800
Giga Gagagigoギガ・ガガギゴNormal MonsterReptile24501500
Graydle Slimeグレイドル・スライムEffect MonsterTuner monsterAqua02000
The Great Emperor Penguin大皇帝ペンギンEffect MonsterAqua18001500
Hydro Magicianハイドロ・マジシャンNormal MonsterSpellcaster17001500
Ib the World Chalice Justiciar星杯の神子イヴSynchro Monster
Effect Monster
Tuner monsterSpellcaster18002100
Kairyu-Shin海竜神Normal MonsterSea Serpent18001500
Lappis Dragon彩宝龍Effect MonsterTuner monsterSea Serpent02600
The Legendary Fisherman伝説のフィッシャーマンEffect MonsterWarrior18501600
The Legendary Fisherman II伝説のフィッシャーマン二世Effect MonsterWarrior22001800
Loud Cloud the Storm Serpent擾乱騒蛇ラウドクラウドEffect MonsterReptile02000
MajioshaleonマジオシャレオンEffect MonsterReptile2000800
Man-eating Black Shark黒き人食い鮫Fusion MonsterFish21001300
Marincess Crown Tail海晶乙女クラウンテイルEffect MonsterCyberse6002300
Marine Beastマリン・ビーストFusion MonsterFish17001600
Mech Bassサイボーグ・バスNormal MonsterMachine18001500
Mecha Sea Dragon Plesion機海竜プレシオンEffect MonsterMachine23001800
Metal Fishメタル・フィッシュNormal MonsterMachine16001900
MisairuzameナイルNormal MonsterFish14001600
Nekroz of Catastorカタストルの影霊衣Ritual Monster
Effect Monster
... further results (22 more)
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