Conversation so far:
What comics did Sandman appear in during the Silver Age?
Reintroduced in the Silver Age in Justice League of America #46 (July 1966), the Sandman made occasional appearances in the annual teamups between that superhero group and the JSA.
What other comics was the Sandman (Wesley Dodds) in besides Justice League of America #46?
Sandman Mystery Theatre: Sleep of Reason
Who wrote the Sandman Mystery Theatre: Sleep of Reason comics?
Matt Wagner and Steven T. Seagle

Question: What powers or special skills did he have?
Self-contained rewrite: What powers or special skills did Sandman have?