Arbalist

The Arbalist is the second Zard to appear in Black Citadel, and appears in all difficulties. Being an early game enemy with high damage and decent range, enough for most buildings to be unable to reach, it is recommended to not let them group up or else they will tear apart your defenses.

Even Robo Bullies are no match to their numbers, and so it is important to deal with them and/or get at least 3 Regenerators.

Notably, sometimes they will walk directly into a building before attacking. This is due to them trying to target the crystal normally.