"When we first meet him, this "Old Master" is frail, hesitant, even fearful. As the story continues, you see those traits melt away, but there's a flow to it. The more Ezra trusts, the more Maul becomes himself until, finally, he's at full strength and more powerful than ever." -- http://www.starwars.com/news/rankin...-the-apprentice
"Darth Maul returned to the Star Wars universe in a big way this year. It seems like there’s just no calling it quits for the vengeful Sith Lord. Although he has grown older and gained new abilities throughout his life, Darth Maul still builds on the teachings he received from Darth Sidious. Now, he’s trying to pass them on to Ezra Bridger." -- http://www.starwars.com/news/darth-...f-an-apprentice