Altair, Brotherhood Mentor - Kelsien, the Plague
MTG · Secret Lair Drop Series · M · 1558
Released 2026-07-28
$12.50
30-day forecast: $12.71
Live MTG price tracking, buyout detection, and price predictions for Altair, Brotherhood Mentor - Kelsien, the Plague on TCG Collector Tools.
Prices Across Marketplaces
Price Forecast
| Horizon | Forecast | vs Today |
|---|---|---|
| 7 days (stable) | $12.68 | +1.4% |
| 30 days (stable) | $12.71 | +1.7% |
| 90 days | $12.09 | -3.3% |
| 180 days | $12.09 | -3.3% |
| 1 year | $12.09 | -3.3% |
Confidence 37% · Calibrated 30-day range $10.73–$14.69 · presale card · veryLow volatility
Our Forecast Track Record
What we predicted for this card, and what actually happened. We publish misses as well as hits. Anchored 2026-05-15 · at $14.25 · 75 days ago.
| Horizon | We predicted | Actual | Error |
|---|---|---|---|
| Day 7 | $13.81 | $14.98 | +8.5% |
| Day 30 | $13.38 | $14.25 | +6.5% |
Signal Analysis
Mixed signals. Monitor for clearer direction.
Recent Price History
Frequently Asked Questions
How much is Altair, Brotherhood Mentor - Kelsien, the Plague worth?
Altair, Brotherhood Mentor - Kelsien, the Plague is currently $12.50 on TCGplayer for the Secret Lair Drop Series printing. Prices update daily from live marketplace data.
Is Altair, Brotherhood Mentor - Kelsien, the Plague going up or down in price?
Our 30-day forecast for Altair, Brotherhood Mentor - Kelsien, the Plague is $12.71, with a stable trend at 37% confidence.