Build time

A unit's build time, signified by the icon, is the number of turns after purchase before the unit is actually active on the field.

Prompt blockers are units that have zero build time, but note that even these units cannot use their ability in the same turn they are purchased.

A unit is shown to be currently building with a yellowed tile and is said to be Under Construction. Units that are Under Construction do not affect the boardstate, and can't be attacked unless all of the owner's units are not under construction.