Can you play a reaction in response to Jinx Legend's beginning step trigger to remove opponent's permanents before they can respond?

Ruling: Yes, you can play reactions in response to Jinx Legend's triggered ability. The trigger occurs at the start of your turn regardless of hand size, and both players can play reactions at this time.

Sequence:

• Jinx Legend's "At start of your turn" ability triggers
• Both players can play reactions at this time
• When the ability resolves, it checks hand size (draws if one or less cards, does nothing if more than one)

Nuances:

• The hand size only matters when the ability resolves, not when it triggers
• This applies similarly to other beginning/end step triggers like Annie's
• This gives opponents opportunities to react that they wouldn't normally have during end steps