By inputting Down B, Hero will enter a thinking pose and a menu will appear over his damage meter displaying four spells and their respective MP cost. This menu which can be navigated by pressing up or down on the movement stick and the spells can be used with an attack button, in which case the spell will activate if enough MP is available to pay the cost. Hero can have the menu active for ten seconds before disappearing. However, if he is attacked before selecting the menu will disappear. Hero can cancel the menu at any time on the ground by jumping, rolling or shielding and in the air by air dodging or double jumping if available. While Command Selection is active, MP will pause in refilling until a spell is used or the menu is interrupted by being cancelled or if Hero is attacked.
The selection of spells available is generated randomly, with no spell appearing twice in a row or twice in the same menu. Certain spells won't appear in conjunction with others. If Hero wishes to use a certain move, he must cancel the menu and reactivate Command Selection until he gets the right one. Hero can control in which direction the spell comes out in by holding right or left while selecting a spell. By default, spells are cast in the direction Hero is facing. This is vital for attacking opponents behind Hero and can serve as a surprise attack against people who are unaware of this feature and try to attack from behind. In general, Sizz and Bang have the most chances of appearing and Hocus Pocus and Magic Burst have the least chances. Command Selection gives Hero a wide variety of attacking or buffing himself up, though the randomness of the spells appearing makes finding the correct spell difficult, making it vital for Hero to quickly react to the current selection and switch if necessary. The move's slow speed makes it more useful for edgeguarding or when the enemy is far away, as you can then take your time to select the right spell.