Okay, my first feature request on the new forum.
How about an impurity in the tar where if Beethro stabs it with his sword, it turns all the tar it's connected to into tar babies. Beethro would have to be very careful about stabbing them when he could make sure he can deal with the ensuing hordes.
Beethro might choose to cut the tar mine into a segment by itself before hitting it so he can manage it. But the tar mine might be connected to a tar strand down a corridor he has to go down, so he'd have to use the mine to open the path up.
Or the tar mine could be connected to a chunk of tar that Beethro can't otherwise destroy, but must (using the mine) in order to open a black gate. So he'd have to leave it at least partially connected to the chunk when he hit it.
Tar mines might also be placed in such a way that Beethro would have to be careful about not accidentally hitting any of several, on a sortie through the tar.
Detail: If a tar mine turns in to a tar baby
as a result of the stability rules of tar (not on a 2x2 square since Beethro stabbed next to it), it just disappears into a tar baby. It does not go off. If you want to make sure that can't happen, put a 2x2 block of tar mines in the tar, or put it on an edge next to a curve.
Well, guys, what do you think?
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I was charged with conspiracy to commit jay-walking, and accessory to changing lanes without signaling after the fact
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++Adam H. Peterson