What does "fortification" refer to in the context of Riftbound?

In the context of Riftbound, "fortification" specifically refers to the measures and structures put in place to defend a realm from enemy attacks. This involves building barriers, enhancing defensive capabilities, and creating strategic locations that serve to protect vital resources and areas from adversaries. Fortifications are crucial as they influence the game’s dynamics by providing safety and stability, potentially allowing players to recover and strategize without immediate threat. This concept underscores the importance of defense in gameplay, emphasizing strategic planning and resource management to create a resilient stronghold against the challenges faced in the game.

The other options reflect different elements of the game but do not accurately describe fortification. In-game currency pertains to the economy aspect, units designed for offense focus on attacking capabilities, and a special type of spell would relate to magical elements of gameplay rather than structural defenses.