ABCDEFGHIJK-QRSTUVWXYZ

As long as you have attacked with Ellaminnop this
turn, you may pay {w}{u}{b}{r}{g} to cast this spell.
When ABCDEFGHIJK-QRSTUVWXYZ deals
combat damage to a player, choose a letter other
than L, M, N, O, or P, then exile all non-land permanents on the battlefield that start with the
chosen letter, other than ABCDEFGHIJK-QRSTUVWXYZ and Ellaminnop.
Unblockable, Partner