Thresholder

A portal opened, and Perry's curiosity got the better of him.

Once.

Twice.

Three times did Perry step through a portal, each to a new and strange world.

He stepped through into a world of advanced technology, power armor and micro reactors.

He stepped through into a world of knights and kings, orcs and goblins, where old wizards handed out magical swords.

He stepped through into a world of hidden vampires and rainy streets, where the clocktower tolled the hour as ships sailed by.

Perry is a Thresholder, one of many exploring the vast multiverse. Able to bring ideas, technology, and magic with them as they travel, each Thresholder has an oversized impact on the world they're in, each one attempting to shape and change it to their will. Some, like Perry, try to uplift the world and improve everyone's circumstances, while others are interested only in gaining advantages for themselves.

Why should Perry leave his mark on one world, when he can leave it on all of them?