In order to pull a 'guarantee' limited character from Titania chest and for a time Ice Devil had this function to, you needed to pull 10x draws 6 times. Back in cbt it would reset weekly or so, I don't recall but this was considered a bug wasn't it? I recently pulled 10x draws 3 times and it didn't seem to reset any longer so when I gathered 10 more advance seals, I immediately pulled. It wasn't till after that I noticed that my guarantee reset back to 6 pulls for a guarantee. How is a f2p going to have any chance with this? In One Piece 2, they at least made it so even free pulls/singles counted towards their guarantee and for an 'S/SS' tier hero can't remember.