Cheapest priced copy (Innistrad Remastered): $0.35 at Card Kingdom, near mint, their price list as of .
Triskaidekaphobia 
Enchantment · Rare · Shadows over Innistrad · #141
At the beginning of your upkeep, choose one —
• Each player with exactly 13 life loses the game, then each player gains 1 life.
• Each player with exactly 13 life loses the game, then each player loses 1 life.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
6 printings · $0.35 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Masters 25 | 110 | Rare | $0.49 | $0.79 |
| Innistrad Remastered | 136 | Uncommon | $0.35 | $0.49 |
| Innistrad Remastered | 391 | Uncommon | $0.49 | $0.49 |
| Jumpstart 2022 | 479 | Rare | $0.49 | — |
| Shadows over Innistrad Promos | 141s | Rare | — | $3.49 |
| Shadows over Innistrad | 141 | Rare | $0.59 | $0.49 |
4 rulings from Wizards of the Coast
- 24 January 2025If each player has 13 life as Triskaidekaphobia’s ability resolves, the game ends in a draw.
- 24 January 2025You choose one of the modes even if no player will lose the game. Players will still gain or lose life as appropriate.
- 24 January 2025In a Two-Headed Giant game, each team with 13 life loses the game, then each player on each team gains or loses 1 life, causing the team’s life total to go up or down by 2.
- 24 January 2025If you choose Triskaidekaphobia’s second mode and begin to resolve it while an opponent’s life total is 13 and your life total is 1, that opponent will lose the game before you lose 1 life.