Blood Astronomia (XXI)

Blood Astronomia (XXI) is one of the Arcanas in Vampire Survivors. It is unlocked by reaching Level 50 with Poe.
When this Arcana is active, whenever Garlic, Soul Eater, Pentagram, Gorgeous Moon, Song of Mana, Mannajja, Clock Lancet, Laurel, Sonic Dash and Rapidus Fioactivates, an additional Blood weapon effect also activates. These effects are based on the individual weapons' base stats and the player stats, with calculated stats factoring both of them, player stats cap, oscillating stats, and other bonuses.
It also turn the character's Magnet area into a zone to damage enemies. It has a base damage of 5, multiplied by Amount. It has a Cooldown of 2 seconds and no Knockback.
Brauner starts with this Arcana.
==Garlic and Soul Eater==
When they are off cooldown, they place zones on the ground under the character that each damages enemies individually based on the calculated damage. The amount of zone placed is based on calculated Amount. It lasts for calculated Duration. The Area of the zone are based on Magnet's radius divided by 32 or the calculated Area of the weapon, whichever is bigger.
==Pentagram and Gorgeous Moon==
When they trigger, they place multiple zones around the player which can erase enemies similar to a Rosary. Enemies with instant kill resistance are still immune to this. The amount of zone placed is based on weapon base Amount multiplied by 3, plus player Amount. The zone can be triggered calculated Amount of times before disappearing. They expires after calculated Cooldown plus calculated Duration, which means they would disappear shortly after the weapons trigger again.
==Song of Mana and Mannajja==
When they fire, planets spawn and orbit in an eclipse around the character and the center point stay in place. They orbit further away with higher Magnet. Each planet deals the calculated damage. The amount of planets spawned is based on weapon base Amount multiplied by 3, plus player Amount. Each planet can hit calculated Amount times before disappearing. They expires after calculated Cooldown plus calculated Duration, which means they would disappear shortly after the weapons trigger again.
==Clock Lancet==
When it fires, it places a zone on the ground under the character which deals a flat 5 damage. It does not disappear by hitting any amount of enemies, only after calculated Duration. The Area of the zone are based on Magnet's radius. Enemies hit by the zone are slowed down permanently if the enemy is not immune to debuffs; each hit reduces the Movement Speed of the affected enemy by an additional 1% multiplied by base Amount, until it reaches a minimum of 20% of their original speed. The slow effect stacks multiplicatively with other Movement Speed modifications. This reduces the same attribute as Mannajja so their slowing effect do not stack multiplicatively.
==Laurel==
When it regenerates a shield, it places a zone on the ground under the character. It deals calculated damage multiplied by player Amount plus weapon Amount multiplied by 10. The zone can be triggered the square of calculated Amount times before disappearing. It expires after calculated Cooldown plus calculated Duration, which means they would disappear shortly after the weapons trigger again. The Area of the zone are based on Magnet's radius.
== Sonic Dash and Rapidus Fio==
Creates a linear zone of red starlights at faced direction forward and backward. Occasionally, red constellations will be created across the linear zone, which will explode when being touched by an enemy, dealing area damage.
== Tips==
*These weapons are the only ones that were not able to benefit from Amount without this Arcana. With it, a lot of effects has exponential growth based on Amount.
*As most effects are based on the weapon's base Amount and all have a value of 1 by default without any ability to change it; Gorgeous Moon is an exception where its base Amount can be increased by Limit Break. It can generate the instant kill zones up to the pool limit of the weapon easily and each zone can being triggered a lot of times.
* Evolving Clock Lancet or Laurel into Infinite Corridor or Crimson Shroud remove their Blood weapon effect.
* In the case of Amount exceeding +10 due to golden eggs, the base attack will ignore this cap, allowing it to scale infinitely with Amount. This does not apply to the zones created from other weapons in conjunction with this arcana.
==Trivia==
*The name of this Arcana is a reference to the song "Bloody Tears", which is the theme song to external area out of town of Castlevania II: Simon's Quest.
**It is also a reference to the song Astronomia which is part of the Coffin Dance meme where people would dance with the coffin of the dead to celebrate them, usually used ironically.
*The planets summoned by Song of Mana and Mannajja is based of the planets from our solar system.