When a 2-power unit on Trifarian War Camp (which gives +1 power) is affected by Thousand Tailed Watcher (which gives -3 power), what is the final power? Does War Camp's +1 continue to apply after Watcher's effect?

Ruling: The unit ends up at 1 power. Thousand Tailed Watcher snapshots the current power (including War Camp's +1, so 3 total) and applies -3 to set it to 1. This becomes the new fixed power value, and War Camp's lingering effect no longer applies to that snapshotted value.

Sequence:

• Unit starts at 2 base power
• War Camp's lingering effect makes it 3 power
• Thousand Tailed Watcher snapshots the 3 power and applies -3
• Unit is now set to 1 power for the turn
• War Camp's effect no longer modifies this snapshotted value

Nuances:

• If the unit moves away from War Camp after Watcher's effect, it becomes 0 power (the snapshotted 1 minus War Camp's +1)
• If the unit moves back to War Camp, it returns to 1 power
• Effects that apply after Watcher (like a card giving +1 power) would still modify the snapshotted value normally
• One-time power modification effects like Watcher snapshot the current power and set it to a fixed value, which then no longer benefits from previous lingering effects