Does Divine Judgement target units, runes, and gears when activated, and can it be played if there are 0 or 1 gears on the board?

Ruling: Divine Judgement does not target anything upon entering the chain. The resolution instructs players to choose, but this is not targeting because both players are choosing together, not you alone.

Sequence:

• Divine Judgement enters the chain without targeting
• Upon resolution, players make choices according to the card text
• Turn player chooses first
• You resolve as much as you can with available options

Nuances:

• For an effect to be targeting, you must meet three criteria: (1) You and you alone pick, (2) In a public space, (3) Not from the list of exceptions (must, modifiers, part of costs or targeting restrictions, etc.)
• If there is only 1 gear on the entire board, you can still play Divine Judgement and keep that one gear (resolve as much as you can)
• If your opponent has 3 gears and you have 1, you will choose your gear first (as turn player), then be forced to choose their gear, meaning they get to save all their gears