heavy hammer
Minister of Fire
Maul and some wedges you will get it split. If you are concerned about cutting with a saw and being hard on it get a loop of mill chain for your bar length will go through it no problem. Remember hit anything hard and long enough it will split just depends of the amount of time and effort you want to put forth on something like that. I have been always been told those pieces are some of your best firewood, the grain is the tightest where all those branches grow off and twist up and out. Swing away