Tier II - Build a grand Dungeon Underground, fill it with structures that will enrich you, and protect it with eternal clay soldiers and traps.
"Rulers who build lasting empires understand the value of the Underground. Let others bicker on the surface as their empires crumble under the harsh light of the sun, whilst your city sprawls across endless caverns and grottoes. Build mighty Dungeons and armies of clay to thwart those who dare venture Underground. Let time pass above, for your legacy in the depths is eternal." - Thrudgelmir, Giant King of Myrrida