Damage can be converted from one type to another. This causes it to deal the new damage type, scale with modifiers to the new damage type, and no longer scale with modifiers to the old damage type.

For example, Fire damage converted to Lightning now scales with Lightning damage modifiers and causes Shock, but no longer scales with Fire damage modifiers or causes Ignite.

Conversion is a two step process. Conversion inherent to Skills occurs first, then Conversion from all other sources. Damage over time cannot be converted.