Library of Alexandria

{T}: Add {C}.
{T}: Draw a card. Activate only if you have exactly seven cards in hand.

Mox Jasper

{T}: Add one mana of any color. Activate only if you control a Dragon.

The Ur-Dragon

Eminence — As long as The Ur-Dragon is in the command zone or on the battlefield, other Dragon spells you cast cost {1} less to cast.
Flying
Whenever one or more Dragons you control attack, draw that many cards, then you may put a permanent card from your hand onto the battlefield.

Black Lotus

{T}, Sacrifice this artifact: Add three mana of any one color.

Mox Diamond

If this artifact would enter, you may discard a land card instead. If you do, put this artifact onto the battlefield. If you don't, put it into its owner's graveyard.
{T}: Add one mana of any color.

Mox Jet

Ancestral Recall

Mox Amber

{T}: Add one mana of any color among legendary creatures and planeswalkers you control.

Mox Emerald

Chaos Orb

{1}, {T}: If this artifact is on the battlefield, flip it onto the battlefield from a height of at least one foot. If this artifact turns over completely at least once during the flip, destroy all nontoken permanents it touches. Then destroy this artifact.

Timetwister

Each player shuffles their hand and graveyard into their library, then draws seven cards. (Then put Timetwister into its owner's graveyard.)