ji-mao day pillar

卯 holds 乙, yin wood, and 己 above it is yin earth. Wood controls earth at the same polarity, so 乙 is Seven Killings from this day stem, a name that frightens more than its rule does. The books cannot agree where the name even begins: 三命通會 says 有制谓之偏官，无制谓之七煞, kept in check it is Indirect Officer and unchecked it is Seven Killings, while 淵海子平 divides the same two names by the condition of the day master as well.

五行大義 has earth born at this very branch, 生於卯, in its main statement. This site's fire-earth count gives 己 Sickness at 卯, and a water-earth count run forward with no yin reversal would land on Death. Hidden stems shift too, since 三命通會 gives 甲 a first week in the branch.

Sharing 城頭土 with 戊寅, this pair turns the image around. 三命通會 卷一 says 己卯土，破堤败城, breached embankments and ruined walls, and 喜申酉及火, pleased by 申, 酉 and fire. A wall in disrepair is the picture the entry gives of the pair, and it applies that picture to no one in particular.