Puzzlebox (Begin the game with this and another card you own from outside the game in the command zone, locked. That card is face down until you unlock this.) Tap four untapped creatures you control: Unlock Clockwork Astrolarium. If the revealed card is white, put it into your hand. Otherwise, put it on top of your library.
({T}: Add {R}.) As Cloudpeak Spires enters the battlefield, you may pay 1 life. If you don't, Cloudpeak Spires enters the battlefield tapped. Basic lands you control have “{T}: Add {R}.”
{T}: Add {C}. {1}: Clutch of the Coil becomes a 1/1 Snake creature with poisonous 2 until end of turn. It's still a land. (Whenever this creature deals combat damage to a player, that player gets two poison counters.)
The Soulbreaker Gang offers a portion of each robbery's spoils to the dead god Aghavaan.
{T}: Add {C}. {T}, Pay 1 life: Add {B}. {5}{B}, {T}, Sacrifice Collapsing Ridges: Return target creature card from a graveyard to the battlefield under your control. Activate only as a sorcery.
Combined Generator can't be blocked except by three or more creatures.
“The unnatural creatures have been coming in bigger clusters, each stronger than the sum of their parts. Someone needs to find the source.” —Professor Maple
{T}: Add {C}. {T}: Put a +1/+1 counter on each legendary creature and a loyalty counter on each planeswalker that entered the battlefield under your control this turn.
Pulled from an extradimensional space, the fortress provides valuable defenses whenever and wherever it's needed.
“Among the greatest of treasures lost was Conto Sika, the greatest achivement of mankind, hosting more knowledge in a room than in all of Mataki.” —The Great Calamity: A History
You may play Coralight Castle from your graveyard as long as seven or more cards are in your graveyard. Coralight Castle enters the battlefield tapped. {T}: Add {W} or {U}. Cycling {1}{W}{U}({1}{W}{U}, Discard this card: Draw a card.)
(Color indicator: Cormoran, Raven Monarch is black)
Flying When Cormoran, Raven Monarch enters the battlefield, you may put target creature card with mana value 3 or less from a graveyard onto the battlefield under your control.
(Transform this if it's not attached to a creature. Pay {3}{B} as a sorcery to unattach it.) Enchant creature you control Corrupted Mount's rider gets +5/+4 and can't block.
Cradle of Corruption enters the battlefield tapped. Whenever a creature dies, put a creation counter on Cradle of Corruption. {T}, Remove ten creation counters from Cradle of Corruption and sacrifice it: Put up to two target creature cards from graveyards onto to battlefield under your control. Activate only as a sorcery.