Addendum

A blond human who is actually a dragon carries a golem hammer through the portal. What lies on the other side? A tyrant who's actually a transformed black hole, of course, but the point is, hammers are only a good weapon for a hero if they're really big, and I mean ultra huge.

Transform!

Obviously dragons can transform into people and civilian vehicles into intelligent robots, but don't forget to have spaceships transform into portals to another galaxy, golems transform into hammers, and dwarves transform into super dwarves (their beards change color).