Can you use reaction speed effects in response to unit abilities like Snapvine's trigger from Aurora?

Ruling: You can play reaction speed spells or activate reaction speed abilities in response to triggers like unit abilities. You can react to pretty much anything on the chain with reaction speed effects, except units/gear which resolve immediately when put on the chain.

Sequence:

• Unit ability trigger (like Snapvine) goes on the chain
• You can respond with reaction speed spells or abilities
• The reaction resolves first
• Then the original trigger resolves with the modified game state

Nuances:

• Units and gear cannot be reacted to because they resolve as soon as they're put on the chain
• Effects like reducing might before a damage trigger resolves will affect the damage dealt when that trigger resolves