Syrix, Sun God

Flying, Vigilance, Haste
When Syrix, Sun God enters the battlefield
or attacks, destroy all creatures then return all
phoenixes in all graveyards and exile to the
battlefield under your control tapped and attacking
if Syrix is attacking. This may only trigger once
per turn.
Sacrifice three phoenixes: You may cast
Syrix, Sun God from your graveyard
this turn