# Turn Order - Main Phase

#### General Rules:

1. State-based effects are checked: If any effects cause a change in the game state, the turn player gains Opportunity after each ability pending resolution is placed onto the Effects Stack. The phase will continue to the next step after the Effects Stack is empty.
2. Opportunity: The turn player receives Opportunity.
   1. During this phase, the turn player may perform any slow or fast player actions while they have Opportunity and the Effects Stack is empty or they may proceed to the end phase.
   2. Attacking is considered to be a slow player action and will immediately start a [combat phase](/game-mechanics/game-mechanics-turn-order/turn-order-combat-phase.md). The game will return to the main phase after the end of combat at step 2.
      1. A new main phase will not begin; there is only one main phase per turn.
   3. If any player actions were taken during the passing of Opportunity or any effects, activations, or materializations entered the Effects Stack, step 2 happens again (the turn player receives Opportunity) after Effects Stack becomes empty.
   4. Non-turn players may only activate cards or take player actions at fast speed during this phase when they have Opportunity.
3. The turn player controls the passage to the end phase from the main phase. If the turn player passes Opportunity while the Effects Stack is empty, and each other player passed Opportunity with taking an action, the game immediately proceeds to the end phase.


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