Spire of Industry [Aether Revolt Prerelease Promos] Invasion and it has "{2}{U}{U}: Return

and it has "{2}{U}{U}: Return this creature to its owner's hand at the beginning of the next end step

your opponents can't cast spells or activate abilities of artifacts

and finally the Hour of Eternity

Set: Urza's Saga Type: Sorcery Rarity: Rare Cost: {R} Search your library for a card

Set: Alpha Edition Type: Sorcery Rarity: Rare Cost: {2}{U} Each player shuffles their hand and graveyard into their library

Spire of Industry [Aether Revolt Prerelease Promos] Invasion and it has "{2}{U}{U}: ReturnSet: Aether Revolt Prerelease Promos Type: Land Rarity: Rare {T}: Add {C}. {T}, Pay 1 life: Add one mana of any color. Activate only if you control an artifact. A beacon of prosperity to some, a shadow of oppression to others.