Madame Leota

Call In The Spirits (Any other legendary creature
with Call In The Spirits can be used as a
second commander)
At the beginning of your end step, if a spirit
creature died this turn, seek an artifact or
creature card with a mana value equal or lesser
than Madame Leotas toughness. Madame Leotas toughness is equal to the number of spirit
creatures and artifacts in your graveyard.