Trebuchet

2

Action: Deal 3 true damage to an enemy building up to 2 squares away from trebuchet. (Long-range attack)

Ranged Armor 2: This unit takes 3 less damage when attacked with Ranged attacks.

The counterweight trebuchet was the ultimate siege engine starting in the 13th century, until gunpowder rendered it obsolete in the late 15th century.