Armillary Sphere

{2}, {T}, Sacrifice Armillary Sphere: Search your library for up to two basic land cards, reveal them, put them into your hand, then shuffle.

Sky Diamond

Arcane Signet

{T}: Add one mana of any color in your commander's color identity.

Phenax, God of Deception

Indestructible
As long as your devotion to blue and black is less than seven, Phenax isn't a creature.
Creatures you control have "{T}: Target player mills X cards, where X is this creature's toughness."

Doubling Cube

{3}, {T}: Double the amount of each type of unspent mana you have.

Charcoal Diamond

Charcoal Diamond enters tapped.
{T}: Add {B}.

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