Leg Avenue Immortal Mistress Costume Dress

Immortal Mistress Costume Dress

$130.00
✦ Rave Exclusive — Use Code: RAVE10 for 10% Off

Rave Exclusive Discount

Use code RAVE10 at checkout for 10% off your order.

Applies to all rave & festival styles.

Pride Month Exclusive

Use code PRIDE15 at checkout for 15% off Pride Month Collection items.

Valid through June 30, 2026.

Color: Black

Black

Size: X-SmallSize Guide

X-Small
Small/Medium
Medium/Large
X-Large
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Product Details

Enslave them, body and soul with the iconic Immortal Mistress Halloween costume by Leg Avenue. Sultry, elegant, and absolutely irresistible, this sexy Halloween costume is sure to take their breath away (literally). The 3 PC costume includes a deep-V body hugging dress with classic tentacle hem and tattered sleeves, sequin belt, and a spooky glitter bat necklace. Pair with your favorite heels and let your inner Morticia shine!

  • PACKAGE INCLUDES: tentacle dress, belt, necklace
  • FIT & STYLE: This dark sexy costume features a sultry deep V-neck and body-hugging high slit dress for a perfect mistress of the night vibe.
  • MATERIALS/ CARE: Hand wash cold, Do not bleach, Drip dry, Do not iron
  • OCCASION: This sexy Halloween costume is sure to make heads turn anywhere, from the Halloween party to the cosplay convention.
  • FEATURES: Tattered edges and a sexy silhouette make this a spooky Halloween costume that's unforgettable.
  • COMPLETE THE LOOK: Pair with a Leg Avenue costume wig and grab some friends for the ultimate spooky family affair.
Size Chart

Women's Size Chart

Size UK/AUS Bust (cm) Waist (cm) Hips (cm) Torso (cm)
XXS 2 - 4 74 - 79 58 - 61 81 - 84 66 - 69
XS 4 - 6 81 - 84 61 - 64 86 - 89 66 - 69
S 8 - 10 86 - 89 66 - 69 92 - 94 69 - 71
M 12 - 14 92 - 97 71 - 74 97 - 99 71 - 74
L 16 - 18 99 - 102 76 - 81 102 - 107 71 - 74
XL 18 - 20 104 - 107 84 - 89 109 - 114 76 - 79
1X/2X 20 - 24 109 - 119 91 - 97 109 - 119 79 - 81
3X/4X 26 - 30 122 - 132 99 - 107 122 - 132 79 - 81
S/M 6 - 12 86 - 94 66 - 71 92 - 97 66 - 71
M/L 12 - 16 97 - 102 74 - 81 99 - 107 71 - 76
OS 2 - 16 86 - 102 66 - 81 92 - 107 66 - 76

How to Measure

Illustration showing how to measure bust, waist, hip, and torso
Shipping & Returns

Full details: Shipping & Delivery and Return Policy

Australia orders ship via FedEx. Estimated delivery is 5-8 business days.

Shipping (Australia)

Carrier Estimated Transit Cost
FedEx 5-7 business days Calculated at checkout

GST is included in displayed pricing. No duty fees.

Returns (Australia)

  • Eligible items may be returned within 30 days of purchase.
  • Items must be in original condition (unwashed, unworn, with original tags and packaging).
  • Customers are responsible for return shipping costs and obtaining a return label.
  • Original shipping fees are not refundable unless the error was on our end.
  • Final sale items are not eligible for returns, including lingerie, hosiery, swimwear, face masks, clearance items, and items marked Final Sale.

Seasonal note: Halloween costumes and costume accessories may be final sale during certain promotional periods.

Frequently Bought Together

  • This item: Immortal Mistress Costume Dress
    $130.00
  • 33" Long Straight Wig
    $65.00
Total price:$195.00

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