User blog comment:Fintin/Doflamingo's Survival and Bird Cage/@comment-24799733-20140412200831

Noting how Law knows what it is I doubt it's something regarding a huge cage that traps the entire island.. but then again Pica was there at the end so it could be a foreshadowing of the abilty being connected to him.. I think it's an ability that Doflamingo has up his sleeves, maybe an ability that he used 13 years ago on Cora-san which may explain why Law is so scared of it... unless one day Mingo convened a meeting and said to all his subordinates "hey guys so you know I have this strategy to use if something chaotic happens in the Island and I will call it Birdcage... yeah you know if something happens Pica we'll turn the entire island into a Birdcage with the purpose of just doing that.." I think that's very unlikely and with Mingo being such a strong pirate, why would he have a strategy like that?... and what purpose would it serve if it was a giant Birdcage that covered the island?? not letting anyone go?? sounds too cheesy to me.. but then again unexpected things always happen..