■Card Description
| Name | Altar of Dementia |
| Color | Colorless |
| Cost | -2 |
| Cardtype | Artifact |
| Subtype | |
| Rarity | Rare |
| Oracle | Sacrifice a creature: Target player puts a number of cards equal to the sacrificed creature's power from the top of their library into their graveyard. |
| Flavor Text |
It is not that you will go mad. It is that you will beg for madness. —Volrath |
| Expansion | Conspiracy |
| Illustrator | Brom |
| Legality | Premodern,Middle School,Modern,Commander,Legacy,Vintage |
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■Modern
Zombie
- Player : Fukazawa Shun
- Tournament : Old-frame Modern Arena
- Score : 3-0
- Participants : 4
- Date : 2025/09/13
Tron
- Player : Takahashi Makoto
- Tournament : Old-frame Modern Arena
- Score : 3-0
- Participants : 3
- Date : 2025/07/12
Rogue
- Player : ASPIRINGSPIKE
- Tournament : Modern League - 2024/3/29
- Score : 5-0
- Participants :
- Date : 2024/03/29
■Legacy
Hogaak
- Player : byzantinepundit
- Tournament : Legacy Challenge 32 - 2026/03/28 #1
- Score : 3rd Place
- Participants : 46
- Date : 2026/03/28
Hogaak
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- Tournament : 17h Kyushu Shogun Championship Legacy
- Score : Top4
- Participants : 34
- Date : 2026/02/22
Hogaak
- Player : Sakabe Taichi
- Tournament : Shizuoka Daily event
- Score : 3-0
- Participants : 4
- Date : 2025/12/17
■Commander
Thrasios, Triton Hero
- Player : Kanetaka daigo
- Tournament : [Chibakoma!] Points-heavy acquisition battle [Contest] [Commander]
- Score : TOP4
- Participants : 11
- Date : 2026/03/29
The Mycotyrant
- Player : Kusaka Hideki
- Tournament : Weekend Commander - 2026/3/14
- Score :
- Participants : 32
- Date : 2026/03/14
The Mycotyrant
- Player : Kusaka Hideki
- Tournament : Weekday Commander - 2026/3/10
- Score :
- Participants : 13
- Date : 2026/03/10
■Premodern
Tinker
- Player : Swarped
- Tournament : Premodern Challenge 32 - 2026/03/23
- Score : 5th Place
- Participants : 47
- Date : 2026/03/23
Tinker
- Player : Swarped
- Tournament : Premodern Challenge 32 - 2026/03/18
- Score : 7th Place
- Participants : 43
- Date : 2026/03/18
Tinker
- Player : Uchida Wataru
- Tournament : Premodern Championship - Players Convention Kyoto 2026
- Score : 2nd Place
- Participants : 32
- Date : 2026/03/15
■Middle School
Rogue
- Player : miyoshi kouhei
- Tournament : Wednesday Middle School
- Score : 3-0
- Participants :
- Date : 2026/04/08
Tinker
- Player : Kentaro Shimano
- Tournament : Let's 5 Middle School
- Score : 4-1
- Participants : 11
- Date : 2026/02/21
Tinker
- Player : Hiraishi Taira
- Tournament : 8,000 Hareruya Points Middle School Rumble
- Score : Top8
- Participants : 13
- Date : 2026/01/10