RARE LAND: Create us a Legendary Land.

Aloise's Workshop
Legendary Land (R)
Aloise's Workshop enters the battlefield tapped.
: Add , , or to your mana pool.
: Aloise's Workshop becomes an enchantment in addition to its other types and gains indestructible until end of turn.
: Aloise's Workshop becomes a 0/4 Wall creature in addition to its other types and gains reach until end of turn.
: Aloise's Workshop becomes an artifact in addition to its other types and gains hexproof until end of turn.

Heart Of Maraka
Legendary Land (R)
~ enters the battlefield tapped.
: Add to your mana pool.
: Target forest you control becomes a 3/3 green Treefolk creature until end of turn.

Ventel, the Shifting Sands
Legendary Land (R)
At the beginning of your upkeep, search your library for a land card that doesn't have the same name as a land card exiled with ~, exile it, then shuffle your library. ~ becomes a copy of that card until your next turn.

Legendary Artifact land
:add to your mana pool
:add to your mana pool a mana of any color another artifact you control could produce or whatever reflecting pool rules text says, if I'm not thinking of another card.

Manufactory
Legendary Land
: Add to your mana pool.
, discard a card: Put an artifact land token onto the battlefield with “: Add to your mana pool.” (This counts towards your land limit for the turn.)
Running since recorded time, it's earlier names were synonymous with their creator.

Sanctum of the Sun
Legendary Land
~ enters the battlefield tapped.
: Add or to your mana pool.
, , Sacrifice ~: ~ deals 13 damage to each creature. This damage can't be prevented. If a creature would die this way, exile it instead.

Radiant Sapphire
Artifact
: Add to your mana pool.

\Make an Uncommon Artifact that you're surprised hasn't been printed yet.

Infiltrator's Mask

Artifact - Equipment (U)

Equipped creature has hexproof.
Equip

Now you see me. Now you never will.

Runic Sphere
Artifact
~ doesn't untap during your untap step.
, : Draw two cards.

Wayfarer's Compass |
Artifact (U)
: Target land becomes the basic land type of your choice until end of turn.
"It doesn't take you where you want to go, but where you need to be."
-Volget, the Wanderer

Infinity Stone
Artifact
When you cast a spell, exile Infinity Stone and copy that spell. You may choose new targets for the copy.

Soulless Sentinel
Artifact Creature
Mastery - ~ gets +3/+0.
0/3
The artificers had no difficulty producing working vessels, but a great deal of it trying to animate them. Half a world a way another group was experiencing the exact opposite problem.