Buildings generally take 20 seconds to construct. During this time, a building is 200% more vulnerable to attack, taking twice as much damage, provides no abilities, and cannot attack.
Certain cards, like Banner of Glory, provide an ability called Rapid Construction, where this construction time is drastically reduced.
There are two types of Rapid Constuction, even though they are called the same in the card description:
- Half-Time - such as Makeshift Tower and Tunnel.
- Quarter-Time - such as Banner of Glory , Rallying Banner, and Ice Barrier.