Mulligans
i have finally found a way to use Octosari in a combo
see the following instructions
first step : play Anka, the Buried with Octosari in you hand that way Octosari becomes 1mana cost
second step:when you and your opponent almost go out of cards
1-shuffle Octosari(2 copies or more)
2-return Octosari to your hand with Shadowstep (this is important you don’t want your opponent to kill it) so save 1 shadow step
3- play Mischief Maker , this way octosari will go to your opponent’s deck
4 – play Hecklebot , then kill Octosari using either Plague of Madness or Walk the Plank
5- you can shuffle Mischief Maker , also you can play Spirit of the Shark before Hecklebot if your opponent’s deck is not empty to make sure he summons Octosari
i hope you like this idea, good luck ^_^