This is a question that had been itching me. During a tournament, my opponent used Ballista Squad with Lair of Darkness on the field during my turn. Now usually cards would state ‘once per turn during either players turn’ but with Lair of Darkness it’s states ‘once Per turn you can tribute one of your opponents monsters to activate an effect’. Considering it is still my turn could Lair of Darkness allow Ballista Squad to tribute my monster?