Arcana Living shapes
Keywords: Life & Death
I don't think you'd ever see this shape in a game, but it's interesting in that there are four co-dependent groups.
Here's a group of three units.
And the list goes on and on...
-- FCS
KarlKnechtel: Since I mentioned it, here's the (highly illogical) way to make seki inside the bulky five.
Ellbur - This is another living shape you would never see in a real game.