Vesper, the Twentyfirst

Echo costs of creatures you control cost X less, where X is that creature’s converted mana cost. Creatures you don’t control now have an Echo cost equal to that creature’s mana cost -{1} If a creature you control would be sacrificed due to not paying its echo cost, then instead return it to your hand. If a creature your opponents control would be sacrificed due to their mana cost, you may search your deck for a spell with Echo with converted mana cost equal to that creature’s converted mana cost.{/color#ffffff}