The Eternal Ashes is a craftable Hardmodesummon weapon. It summons a Phoenix that shoots exploding fireballs at nearby enemies. The summoned Phoenix inflicts Minion damage, but is different from traditional minions in that it does not take up a minion slot, and does not follow the player.
As the Phoenix does not count toward the minion cap, it will not cause any traditional minions to despawn; though summoning a second Phoenix will always cause the first to disappear, even if the player has Minion bonuses.
Its best Modifier is Ruthless. The Mythical modifier provides the widest array of stats bonuses, but these primarily affect the initial summon rather than the resulting minion. Additionally, Minions cannot deal critical hits. The only significant advantage a Mythical Eternal Ashes has over a Ruthless one is knockback.