[Endoperez]

Ungoliath-style spider could be a national spell. There are many national spells that summon unique, more or less independent, divine or infernal creatures. Spentas, Mictlan's summons, Pyth/Mari angels, two nations whose spells you haven't seen yet...

After the next patch or so, you can #copystats an "eternal enemy of the sun", with some rather striking powers.