Aginn, Maelstrom Mage

Eminence—As long as Aginn, Maelstrom Mage is in the command zone or on the field, the first Elemental creature you cast each turn has cascade.
Whenever one or more Elemental creatures you control attack, you may tap any number of untapped Elementals and create a 2/2 Elemental creature token for each Elemental tapped to activate this ability.