Rem is a unique hero that is very weak in combat and relies heavily on good macro decisions both in map pressure and in fights.
The majority of Rem's power comes from 
Lil Helpers and can be used to tactically steal Sinner's Sacrifices and shove lanes without appearing
From the official Deadlock Steam page:
"An accidental stowaway from the world of dreams, Rem has found himself stranded in the city that never sleeps. Pillow fights are Rem's preferred form of conflict, tossing his favorite pillow at enemies to knock them back when they're getting too close.
His friends, however, he likes to keep nearby - leaping to their aid when things get dicey and taking a quick nap on their shoulder. His Lil Helpers are curious creatures, taking interest in everything the streets of New York have to offer, and cheering on his allies as they go.
Ultimately when Naptime hits, no one will be able to keep their eyes open. - The best part of being asleep, is being asleep."
Lore
An accidental stowaway from the world of dreams, Rem has found himself stranded in the city that never sleeps. Driven by his curious nature, Rem and his helpful friends have been seen wandering across the five boroughs in search of a way back home.
So if you ever find yourself dozing off while taking the Blue line home from work, maybe you've just had an encounter with one of the Cursed Apple's newest denizens.
