A Stalwart Poro (2 Might) is alone at a battlefield. Opponent plays Thousand-Tailed Watcher, applying -3 Might (minimum 1). Then a unit moves to that battlefield and a showdown starts. With Wuju Bladesman, Starter (Master Yi Legend: 'When a friendly unit defends alone, it gets +2 Might') active, what is the Poro's Might during the combat showdown?

Ruling: The Poro has 4 Might during the combat showdown.

Sequence:

• Stalwart Poro (2 Might base) is alone at battlefield
• Thousand-Tailed Watcher resolves, applying -3 Might (minimum 1)
• Poro is at 2 Might when Watcher resolves
• Snapshot calculation: 2 - 3 = -1, but minimum is 1, so the reduction snapshots at -1 (bringing Poro from 2 to 1 Might)
• Unit moves to battlefield, showdown begins
• Defender designation established
• Shield ability triggers: +1 Might (while defending)
• Wuju Bladesman triggers: +2 Might (defending alone)
• Final calculation: 2 (base) - 1 (snapshot) + 1 (Shield) + 2 (Wuju) = 4 Might

Nuances:

• Snapshotting applies to effects with limitations (like 'to a minimum of 1')
• The limitation is calculated at the moment the effect applies, based on the unit's current Might at that time
• The calculated modifier is 'remembered' and fixed for the duration of the effect
• Subsequent Might changes don't recalculate the snapshot - they simply add/subtract from the total
• In this case, combat buffs (Shield and Wuju Bladesman) apply after the Watcher's effect has already snapshotted, so they add normally to the modified value