Doubling Cube [Tenth Edition] Planechase Anthology Set: March of the Machine:

Set: March of the Machine: The Aftermath Type: Legendary Artifact Creature — Golem Rarity: Mythic Cost: {5} Karn

Set: Secret Lair Drop Promos Type: Land Rarity: Rare {T}

It looks like currant jam

Set: Double Masters Type: Creature — Human Advisor Rarity: Mythic Cost: {2}{R} When Imperial Recruiter enters the battlefield

if you attacked with creatures with total power 6 or greater this combat

Doubling Cube [Tenth Edition] Planechase Anthology Set: March of the Machine:Set: Tenth Edition Type: Artifact Rarity: Rare Cost: {2} {3}, {T}: Double the amount of each type of unspent mana you have. The cube's surface is pockmarked with jagged runes that seem to shift when unobserved.