Czechia 7, Denmark 2
Vladar ran out a winner - and earned an assist on the deciding goal - in his World Championship debut, making 29 saves as the Czechs dumped the Danes 7-2.
Czechia broke the game open in the second period, scoring four times over a 13-minute span. Avalanche star Martin Necas and Bruins sniper David Pastrnak were among the goal-getters, with Pastrnak's highlight-reel marker standing out as the game-winner.
Nick Olesen got Denmark on the board with just over a minute remaining in the middle stanza.
Necas added his second - and Czechia's fifth - goal of the game four and a half minutes into period three, and the Czechs never looked back, jumping to the top of Group B with eight points.
Vladar's busiest period was the third, during which he turned aside 11 shots. The contest marked his first appearance at a major IIHF tournament since the 2017 World Juniors in Canada.
Pastrnak and fellow forward Lukas Sedlak each finished the game with a goal and two assists.
Flames forward Adam Klapka did not dress.