If a player would draw a card except the first one they draw in each of their draw steps, that player discards a card instead. If the player discards a card this way, they draw a card. If the player doesn't discard a card this way, they mill a card.
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City of Shadows
Land
{T}, Exile a creature you control: Put a storage counter on City of Shadows.
{T}: Add {C} for each storage counter on City of Shadows.
{0}
Gustha's Scepter
Artifact
{T}: Exile a card from your hand face down. You may look at it for as long as it remains exiled.
{T}: Return a card you own exiled with Gustha's Scepter to your hand.
When you lose control of Gustha's Scepter, put all cards exiled with Gustha's Scepter into their owner's graveyard.
{2}{B}{B}{B}
Hellfire
Sorcery
Destroy all nonblack creatures. Hellfire deals X plus 3 damage to you, where X is the number of creatures that died this way.
{2}{B}
Khabál Ghoul
Creature - Zombie
At the beginning of each end step, put a +1/+1 counter on Khabál Ghoul for each creature that died this turn.
1 /
1
{6}
Mana Matrix
Artifact
Instant and enchantment spells you cast cost up to {2} less to cast.
{0}
Mox Jet
Artifact
{T}: Add {B}.
{3}{B}
Nether Void
World Enchantment
Whenever a player casts a spell, counter it unless that player pays {3}.
{1}{W}{W}{U}
Supreme Verdict
Sorcery
This spell can't be countered.
Destroy all creatures.
{3}{B}
The Abyss
World Enchantment
At the beginning of each player's upkeep, destroy target nonartifact creature that player controls of their choice. It can't be regenerated.
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Unholy Grotto
Land
{T}: Add {C}.
{B}, {T}: Put target Zombie card from your graveyard on top of your library.