Kazi'Shaon, the Malformed

Imposing Presence - As long as Kazi'Shaon, the Malformed is your commander, Spirits you
control gain Soulshift X, where X is that creature's power.
When Kazi'Shaon enters the battlefield, you may cast any number of Spirits with combined
converted mana cost X or less from your hand without paying their mana costs, where X is the amount of mana spent to cast Kazi'Shaon.