Auralth, Life Unbound

Eminence - As long as Auralth is in the command zone or on the battlefield, you may spend mana as though it were mana of any color to cast other Elemental spells or activate abilities of Elementals.

Vigilance, trample, haste

Whenever one or more Elementals you control attacks,exile up to two target creatures from the battlefield or a graveyard, they become an Elemental in addition to their other types, you may play those cards as long as they remain exiled.