Zurvax, Titan of the Skys

When Zurvax enters the battlefield, sacrifice it
unless it escaped.
When Zurvax enters the battlefield or attacks, up
to two target creatures you control get +2/+2 and
gain flying until end of turn.
Escape — {w}{w}{w}{w} Exile five other cards from
your graveyard.
Niliris will need Zurvax to defeat Kildorad.