Okay, I've been away from the forum for a while here, so I'm sorry if someone mentioned ideas like these already and I simply haven't seen them yet, but I've had a couple ideas bouncing around in my head recently.
How about this one:
(I started thinking about it after finishing work on
this picture. The idea evolved dramatically from the starting point, however.)
The Bog Eel is a serpent type creature that is primarily made up of the slime that grows in shallow water. As such, it can't go into deep water because it would be dispersed, and it mostly can't go onto land or it will dry out. It may venture up on land as long as the two adjacent segments (or one if it's the head or tail) are in shallow water.
This means that it can chase you across islands of one square or peninsulas that are one square wide.
You can kill it one segment at a time with your sword at either end, but since it lives in the shallow water, you have to make sure that you can attack it from dry land. But since the head can attack as long as the next segment remains in the water, you can't count on being safe on the shoreline without keeping your wits about you.
Or my second idea which I'll admit still feels a bit under-developed:
(Which I started thinking about after making
this picture)
The Flying Sea Turtle can fly over pits, swim through water, or walk on land. However, when it's on land, it can only move every other turn. Basically, if it is on land and it moved last turn, it must wait, but if it waited last turn or is not on land, it is free to move now.
When the turtle has been killed, the shell is left behind as a moveable object. I was musing that, once pushed into the water, it could be used as a 1X1 water platform. Or possibly it would just become a stepping stone in shallow water.
I'm not completely sure which would be better as an addition to the staple of beasts.
Right now, nothing can be turned into a platform. So that's one reason it could be a good idea. However, I've noticed that some people here seem to not like ideas that aren't just variations on existing themes, so that could be a vote against.
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