There is a big downside however: the price
Thankfully Ancient Copper Dragon dies to most removal and takes a long time to deploy
Dimir Graveyard with Kiora, the Rising Tide 4 Deep-Cavern Bat 4 Faerie Dreamthief 1 Razorlash Transmogrant 2 Aclazotz, Deepest Betrayal 1 Terror Ballista 4 Gnawing Vermin 4 Overlord of the Balemurk 4 Kiora, the Rising Tide 4 Fallaji Archaeologist 2 Chupacabra Echo 4 Wail of the Forgotten 2 Revenge of the Rats 2 Virtue of Persistence 4 Dead Weight 4 Invasion of Amonkhet 2 Liliana of the Veil 2 Jace, the Perfected Mind 4 Restless Reef 4 Darkslick Shores 4 Gloomlake Verge 4 Undercity Sewers 8 Swamp 2 Island 4 Underground River 2 Ghost Vacuum 2 Season of Loss 2 Duress 2 Withering Torment 1 Razorlash Transmogrant 4 Huskburster Swarm 2 Terror Tide Kiora, the Rising Tide is another awesome build-around card from Foundations , seamlessly fitting into a blue-black descend deck
Most things get easier with that enchantment, to be fair
My instincts tell me that we would want to start with six Horizon Lands total, and its important that you dont dare play less than four Horizon Canopies to make room for them
Most of the time, this means during your main phase when the stack is empty