Timberwolves center Karl-Anthony Towns’ six blocked shots during a rollicking victory at Indiana on New Year’s Eve tied a career high reached twice before, but not since the first three months of his rookie season. His league-leading 29th double-double this season — 18 points, 14 rebounds — is old news. His activity defending the rim is something of a revelation on the nights it comes, like on Sunday. “He was phenomenal,” veteran teammate Taj Gibson said. “We need him to be like that every night. He’s just getting accustomed to things. “I think he has grown a lot more, especially on the defensive end. He has taken the challenge. It showed tonight, but we’re going to need a lot more nights like that from him.”