Elements (Wet, Oil, Burning)
Element statuses on holes and moles: water conducts electricity, oil carries fire, water puts fire out.
WET (Downpour rain and other pieces): an electric BONK on a wet mole zaps every wet mole within two holes, with the same origin. A wet hole cannot burn.
OIL (Oil Slick rows): a fire BONK on an oily hole runs along the whole oily row and BONKs every oily mole, then the oil is gone; the hammer's own strike on an oily hole also lights it. A Bomb exploding in oil blasts one ring further.
BURNING (Fuse Head and fire pieces): a lit hole BONKs the mole in it; embers keep burning for a few rows and BONK a mole that stands in them. Water beats fire: wetting a hole puts the flame and the embers out.