Fire Pillar

The fire pillar does 20 damage. After 20 pigs, it turns into a cloud. The cloud kills 5 pigs. It costs 40 (2), 36 (4), or 30 (5).

Where to look
See Nehemiah 9:12.

Biblical Reference
In Exodus when the Israelites were freed from slavery in Egypt after the death of Pharoah's firstborn, a pillar of  cloud  led them by day & a pillar of fire by night.