Reckless Attack

Your Commander is a Barbarian in addition to
its other types. Barbarians you control have Blitz
with a cost equal to its mana cost. (You may
choose to cast that spell for its Blitz cost. If you do it
gains Haste and "Whenever this creature dies, draw
a card." Sacrifice it at the beginning of the next end
step.)
Blitz costs you pay cost {1} less for each time
you have cast your Commander from the
Command Zone this game.