{Master Warcraft}

[Raven316]

You only get to decide which creatures attack and block.  The attacking player still decides whether attacking creatures are attacking the player or any planewalkers that player controls.

which means the active player can nullify your attack sequence? Or are u referring to a case if there is a planeswalker involved only?

Only if a planewalker is there.  You can't have creatures attack a non-existent planeswalker.

if you decide to attack a player with a creature and it's not your turn the active player can decide that creatures isn't attacking?

[BlackJester]

Say it your opponents turn. You have two Planeswalkers in play (lucky!). You play Warcraft and have two of their creatures attack you. That opponent gets to choose whether those creatures attack you or either one of your planeswalkers. They make that choice, but they cant otherwise stop the creatures from attacking.

[Raven316]

Gotcha thanks