wu-zi day pillar

霹靂火 is Thunderbolt Fire, and 三命通會 卷一 is blunt about the half that belongs to 戊子: 戊子火，雷也, this fire is thunder. It lists 喜水及春夏, pleased by water, spring and summer. A further clause, 得土而神天, reads roughly as on getting earth, spirit and heaven, and its sense is unclear as the text stands.

Yang earth is set over water, and earth controls water, so the stem has the upper hand on the element count. 癸, the one stem commonly placed in 子, is Direct Wealth from 戊. The seven days of 壬 in the 三命通會 table would add an Indirect Wealth reading.

This site's count gives Conception here, and 五行大義 agrees, with earth also 胎於子 in its main statement. Follow the pairing of earth with water and 子 becomes something like the peak of the round, the place where water holds its throne. Few pairs show the disagreement over earth so starkly.