The combat phase is divided in five steps:
Beginning of combat step
Declare attackers step
Declare blockers step
Combat damage step
End of combat step
Players can cast instants and activate abilities.
Player choses if and which untapped creatures attacks, attacking will tap creatures. Players can cast instants and activate abilities.
The opponent choses if and which untapped creatures will block against the attack. If more than one creature blocks an attacker a ranking of blockes must be chosen by the opponent. Players can cast instants and activate abilities.
Combat begins, each attacking and blocking creature deals its damage and receives it liekwise. if an attacker was not blocked damge is done to the player. Players can cast instants and activate abilities.
Players can cast instants and activate abilities.