MTG: Priority before attacking
Yes, your opponent gains priority and has several opportunities to activate their Gideon&#39;s Lawkeeper.



Your opponent will get priority and may activate their Lawkeeper in your Upkeep, Draw, 1st Main, and Beginning of Combat steps.  You cannot skip any of those steps.  If you draw your card for turn and go straight to combat you're proposing a shortcut, but your opponent is not obliged to accept that shortcut.  They can stop you at any time they would receive priority and cast instants or activate abilities.