so kingswarlock really really needs a pirate au with pirate captain merlin with first mate gwen, where they kidnap arthur and morgana
but morgana is all like FINALLY IM OUT OF THAT SHITHOLE and becomes a member of the crew (master gunner), while arthur acts bratty and sulks
and merlin is just like have it your way and locks him up
can’t have him getting in the way of his crew
but eventually gives him a chance
and arthur turns out to help them fight when the ship is being overrun, being given a sword and it’s badass combat with merlin and arthur side-by-side
but as soon as it’s calmed down, arthur turns the blade on merlin, intending to get his freedom and merlin just shitgrins “can you really do it?” and arthur’s hand begins trembling. cause he can’t. he can’t do it god damn him.