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Altar of Shadows
{7}
Artifact
At the beginning of your precombat main phase, add {B} for each charge counter on ~this~.
{7}, {T}: Destroy target creature. Then put a charge counter on ~this~.
Banshee's Blade
{2}
Artifact -- Equipment
Equipped creature gets +1/+1 for each charge counter on ~this~.
Whenever equipped creature deals combat damage, put a charge counter on ~this~.
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery. This card enters the battlefield unattached and stays on the battlefield if the creature leaves.)
Black Mana Battery
{4}
Artifact
{2}, {T}: Put a charge counter on ~this~.
{T}, Remove any number of charge counters from ~this~: Add {B}, then add an additional {B} for each charge counter removed this way.
Black Market
{3}{B}{B}
Enchantment
Whenever a creature dies, put a charge counter on ~this~.
At the beginning of your precombat main phase, add {B} for each charge counter on ~this~.
Blue Mana Battery
{4}
Artifact
{2}, {T}: Put a charge counter on ~this~.
{T}, Remove any number of charge counters from ~this~: Add {U}, then add an additional {U} for each charge counter removed this way.
Brain in a Jar
{2}
Artifact
{1}, {T}: Put a charge counter on ~this~, then you may cast an instant or sorcery spell with mana value equal to the number of charge counters on ~this~ from your hand without paying its mana cost.
{3}, {T}, Remove X charge counters from ~this~: Scry X.
Chimeric Egg
{3}
Artifact
Whenever an opponent casts a nonartifact spell, put a charge counter on ~this~.
Remove three charge counters from ~this~: ~this~ becomes a 6/6 Construct artifact creature with trample until end of turn.
Coalition Relic
{3}
Artifact
{T}: Add one mana of any color.
{T}: Put a charge counter on ~this~.
At the beginning of your precombat main phase, remove all charge counters from ~this~. Add one mana of any color for each charge counter removed this way.
Conversion Chamber
{3}
Artifact
{2}, {T}: Exile target artifact card from a graveyard. Put a charge counter on ~this~.
{2}, {T}, Remove a charge counter from ~this~: Create a 3/3 colorless Phyrexian Golem artifact creature token.
Culling Dais
{2}
Artifact
{T}, Sacrifice a creature: Put a charge counter on ~this~.
{1}, Sacrifice ~this~: Draw a card for each charge counter on ~this~.
Door of Destinies
{4}
Artifact
As ~this~ enters the battlefield, choose a creature type.
Whenever you cast a spell of the chosen type, put a charge counter on ~this~.
Creatures you control of the chosen type get +1/+1 for each charge counter on ~this~.
Druids' Repository
{1}{G}{G}
Enchantment
Whenever a creature you control attacks, put a charge counter on ~this~.
Remove a charge counter from ~this~: Add one mana of any color.
Empowered Autogenerator
{4}
Artifact
~this~ enters the battlefield tapped.
{T}: Put a charge counter on ~this~. Add X mana of any one color, where X is the number of charge counters on ~this~.
Firemind's Research
{U}{R}
Enchantment
Whenever you cast an instant or sorcery spell, put a charge counter on ~this~.
{1}{U}, Remove two charge counters from ~this~: Draw a card.
{1}{R}, Remove five charge counters from ~this~: It deals 5 damage to any target.
Gemstone Array
{4}
Artifact
{2}: Put a charge counter on ~this~.
Remove a charge counter from ~this~: Add one mana of any color.
Green Mana Battery
{4}
Artifact
{2}, {T}: Put a charge counter on ~this~.
{T}, Remove any number of charge counters from ~this~: Add {G}, then add an additional {G} for each charge counter removed this way.
Grindclock
{2}
Artifact
{T}: Put a charge counter on ~this~.
{T}: Target player mills X cards, where X is the number of charge counters on ~this~.
Jeweled Amulet
{0}
Artifact
{1}, {T}: Put a charge counter on ~this~. Note the type of mana spent to pay this activation cost. Activate only if there are no charge counters on ~this~.
{T}, Remove a charge counter from ~this~: Add one mana of ~this~'s last noted type.
Kilnspire District
Plane -- Ravnica
When you planeswalk to ~this~ and at the beginning of your precombat main phase, put a charge counter on ~this~, then add {R} for each charge counter on it.
Whenever chaos ensues, you may pay {X}. If you do, ~this~ deals X damage to any target.
Kyren Toy
{3}
Artifact
{1}, {T}: Put a charge counter on ~this~.
{T}, Remove X charge counters from ~this~: Add an amount of {C} equal to X plus one.
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