If I have a Vanguard Helm gear at base and I use Baited Hook to kill a unit with a buff on it, can I move that buff using Vanguard Helm to the newly played unit from the hook?

Ruling: No, you cannot move the buff to the newly played unit from Baited Hook. The Vanguard Helm trigger must finalize and choose its target before the unit from Baited Hook enters play.

Sequence:

• Baited Hook kills a unit with a buff
• Vanguard Helm triggers and becomes pending on the chain
• Baited Hook looks at 5 cards and selects a unit, which becomes pending
• Once Hook fully resolves, pending items finalize in the order they were added
• Vanguard Helm finalizes first and must choose a target
• Since the unit from Hook isn't on the board yet, it cannot be chosen as a target
• After Helm finalizes, the unit from Hook enters play

Nuances:

• The entire text of Baited Hook resolves before anything else can be finalized on the chain, but things still become pending in the order they're written
• Playing a unit resolves by adding that unit to the pending chain
• If the newly played unit had a "when you buff a friendly unit" trigger, it would not activate because it wasn't on board when Helm finalized