Altair, Brotherhood Mentor - Kelsien, the Plague
MTG · Secret Lair Drop Series · M · 1558
Released 2026-09-11
$13.45
30-day forecast: $13.47
Live MTG price tracking, buyout detection, and price predictions for Altair, Brotherhood Mentor - Kelsien, the Plague on TCG Collector Tools.
Card Text
Vigilance, haste Kelsien gets +1/+1 for each experience counter you have. {T}: Kelsien deals 1 damage to target creature you don't control. When that creature dies this turn, you get an experience counter.
Prices Across Marketplaces
Price Forecast
| Horizon | Forecast | vs Today |
|---|---|---|
| 7 days (stable) | $13.47 | +0.1% |
| 30 days (stable) | $13.47 | +0.1% |
| 90 days | $13.34 | -0.8% |
| 180 days | $13.34 | -0.8% |
| 1 year | $13.34 | -0.8% |
Confidence: Crystal Ball · Calibrated 30-day range $11.66–$15.28 · 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 · 120 days ago.
| Horizon | We predicted | Actual | Error |
|---|---|---|---|
| Day 7 | $13.81 | $14.98 | +8.5% |
| Day 30 | $13.38 | $14.25 | +6.5% |
| Day 90 | $14.42 | $13.59 | -5.8% |
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 $13.45 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 $13.47, with a stable trend (data confidence: Crystal Ball).