Our conquest of the world is complete! I've already expressed my heartfelt admiration and gratitude for your efforts, my Lord, so perhaps a simple "congratulations" will do here. Oh, and you can have this trophy too.
Wunett Castle didn't stand a ghost of a chance against you, O God of Destruction! Hm? The monsters did all the work, you say? Fear not, my Lord, I know exactly how it is.
Goro Castle has surrendered! Have another trophy for your collection. With this victory, half of the entire world has succumbed to the Netherworld's embrace!
I see you now command a Dragon, the draconic doyen of the monster horde! Fear not, my Lord, the wyrms that serve us have been trained to do their business far from the tower.
Thrusting one's head inside an active volcano can be dangerous, my Lord. Perhaps I should have informed you that there are no monsters to summon dwelling inside.
Upgrade a monster to the highest level, then revel in your power! Or rather, revel in the power of the monster, hopefully without ultimately being destroyed by your own creation in an ironic twist of fate.