Dusk // Dawn [Amonkhet Prerelease Promos] Urza’s Power-Plant A golden helix streaked skyward

A golden helix streaked skyward from the Helvault

or land card from their hand onto the battlefield

Set: Darksteel Type: Artifact Rare Cost: {5} Indestructible (Effects that say "destroy" don't destroy this artifact

a legendary 4/4 colorless Avatar creature token

Dusk // Dawn [Amonkhet Prerelease Promos] Urza’s Power-Plant A golden helix streaked skywardSet: Amonkhet Prerelease Promos Type: Sorcery Sorcery Rare Cost: {2}{W}{W} {3}{W}{W} {2}{W}{W} Destroy all creatures with power 3 or greater. {3}{W}{W} Aftermath (Cast this spell only from your graveyard. Then exile it.) Return all creature cards with power 2 or less from your graveyard to your hand.