Hedron Archive [Commander 2019] SWSH287 where X is the number

where X is the number of cards in your hand

You may reveal an artifact from among them and put it into your hand

When Invasion of Lorwyn enters the battlefield

Set: Commander Legends: Battle for Baldur's Gate Type: Artifact Rarity: Common Cost: {2} Charcoal Diamond enters the battlefield tapped

till the Sun fails and the Moon is dead

Hedron Archive [Commander 2019] SWSH287 where X is the numberSet: Commander 2019 Type: Artifact Rarity: Uncommon Cost: {4} {T}: Add {C}{C}. {2}, {T}, Sacrifice Hedron Archive: Draw two cards. "You've begun to understand the hedrons' true purpose," said Ugin. "The Eldrazi can be imprisoned." "And how did that work out last time?" asked Jace.