Unit Upgrades

Official rule text

97.1 Unit upgrades share a name with a unit that is printed on a player’s faction sheet, but have a higher roman numeral. For example, a player’s “Carrier I” unit is upgraded by the unit upgrade technology “Carrier II.” a The Nekro Virus player may upgrade their units with units of the same type (e.g., “dreadnought” or “infantry”) even if those unit’s names do not match. If the Nekro Virus gains a unit upgrade technology of the same unit type as a unit upgrade technology they already have, the previous upgrade is removed, and they must use the same Valefar Assimilator token that was used to copy the previous upgrade.