On entre dans le cadre des créatures a attaques obligatoires, ce sont des situations qui ne sont pas forcément facile a gérer, heureusement tous cela a été réécrit et on est plus obliger de parcourir les exemples pour trouver le déroulements correct:
508. Declare Attackers Step
508.1. First, the active player declares attackers. This turn-based action doesn't use the stack. To declare attackers, the active player follows the steps below, in order. If at any point during the declaration of attackers, the active player is unable to comply with any of the steps listed below, the declaration is illegal; the game returns to the moment before the declaration (see rule 715, "Handling Illegal Actions").
508.1a The active player chooses which creatures that he or she controls, if any, will attack. The chosen creatures must be untapped, and each one must either have haste or have been controlled by the active player continuously since the turn began.
508.1b If the defending player controls any planeswalkers, or the game allows the active player to attack multiple other players, the active player announces which player or planeswalker each of the chosen creatures is attacking.
508.1c The active player checks each creature he or she controls to see whether it's affected by any restrictions (effects that say a creature can't attack, or that it can't attack unless some condition is met). If any restrictions are being disobeyed, the declaration of attackers is illegal.
Example: A player controls two creatures, each with a restriction that states "[This creature] can't attack alone." It's legal to declare both as attackers.
508.1d The active player checks each creature he or she controls to see whether it's affected by any requirements (effects that say a creature must attack, or that it must attack if some condition is met). If the number of requirements that are being obeyed is fewer than the maximum possible number of requirements that could be obeyed without disobeying any restrictions, the declaration of attackers is illegal. If a creature can't attack unless a player pays a cost, that player is not required to pay that cost, even if attacking with that creature would increase the number of requirements being obeyed.
Donc le joueur devra déclarer toute les créatures ayant été désignée comme devant attaquer comme attaquante, il n'est toutefois pas obliger de le faire si ca l'oblige à payer le cout de l'annexe.
