| Clear Sky Advance | ||
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 Romaji
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Seiten Zenshin | |
| Creator | Trey Arclight | |
| Card type | Spell Card 
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| Property | Ritual 
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Lore This card is used to Ritual Summon any "Air Fortress" monster. You can only activate each effect of "Clear Sky Advance" once per turn.①: Tribute Machine or Warrior monsters from your hand or field, then Ritual Summon 1 "Air Fortress" monster from your hand or GY whose Level exactly equals the total Levels of those monsters. | ||
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