Cheapest priced copy (Murders at Karlov Manor Commander): $0.49 at Card Kingdom, near mint, their price list as of .
Panoptic Projektor 
Artifact · Rare · Murders at Karlov Manor Commander · #44
{T}: The next face-down creature spell you cast this turn costs {3} less to cast.
If turning a face-down permanent face up causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Murders at Karlov Manor Commander | 44 | Rare | $0.49 | — |
| Murders at Karlov Manor Commander | 354 | Rare | $0.49 | — |
4 rulings from Wizards of the Coast
- 2 February 2024Panoptic Projektor’s last ability affects a permanent’s own abilities that trigger when it turns face up as well as other triggered abilities that trigger when that permanent turns face up. Such triggered abilities start with “when” or “whenever”.
- 2 February 2024Panoptic Projektor’s last ability doesn’t copy the triggered ability; it just causes the ability to trigger twice. Any choices made as you put the ability onto the stack, such as modes and targets, are made separately for each instance of the ability. Any choices made on resolution, such as whether to put counters on a permanent, are also made individually.
- 2 February 2024If you control two copies of Panoptic Projektor, a face-down permanent turning face up causes abilities to trigger three times, not four. A third Panoptic Projektor causes abilities to trigger four times, a fourth causes abilities to trigger five times, and so on.
- 2 February 2024Replacement effects are unaffected by Panoptic Projektor’s last ability. For example, abilities that apply “as [this permanent] is turned face up,” such as that of Crowd-Control Warden, are unaffected.