This is totally disgusting. It's a blob of slimy goop, indicative of paranormal activity.
Logs are dropped by the following monsters:
(Note that no item drops will occur in any Arena matches.)
Ectoplasm sells for $4 base rate, but this can be increased with the Miser talent.
Main article: Clockbotting
Using ectoplasm to make a Clockbot causes it to poison monsters.