Nivix, Aerie of the Firemind

: Add .
, : Exile the top card of your library. Until your next turn, you may cast it if it’s an instant or sorcery spell.

Farseek

Search your library for a Plains, Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle.

Thought Monitor

Affinity for artifacts
Flying
When Thought Monitor enters the battlefield, draw two cards.

Emiel the Blessed

: Exile another target creature you control, then return it to the battlefield under its owner’s control.
Whenever another creature enters the battlefield under your control, you may pay . If you do, put a +1/+1 counter on it. If it’s a Unicorn, put two +1/+1 counters on it instead. ( can be paid with either or .)

Mana Geyser

Add for each tapped land your opponents control.

Fungal Reaches

: Add .
, : Put a storage counter on Fungal Reaches.
, Remove X storage counters from Fungal Reaches: Add X mana in any combination of and/or .

Farseek

Search your library for a Plains, Island, Swamp, or Mountain card and put it onto the battlefield tapped. Then shuffle your library.

Mana Tithe

Counter target spell unless its controller pays .

Gemstone Caverns

If Gemstone Caverns is in your opening hand and you’re not playing first, you may begin the game with Gemstone Caverns on the battlefield with a luck counter on it. If you do, exile a card from your hand.
: Add . If Gemstone Caverns has a luck counter on it, instead add one mana of any color.

Horned Helm

Equipped creature gets +1/+1 and has trample.
: Attach Horned Helm to target creature you control.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Amorphous Axe

Equipped creature gets +3/+0 and is every creature type.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Lux Cannon

: Put a charge counter on Lux Cannon.
, Remove three charge counters from Lux Cannon: Destroy target permanent.

Mox Opal

Metalcraft — : Add one mana of any color. Activate this ability only if you control three or more artifacts.

Darksteel Forge

Artifacts you control have indestructible. (Effects that say “destroy” don’t destroy them. Artifact creatures with indestructible can’t be destroyed by damage.)

Oneirophage

Flying
Whenever you draw a card, put a +1/+1 counter on Oneirophage.

Face of Divinity

Enchant creature
Enchanted creature gets +2/+2.
As long as another Aura is attached to enchanted creature, it has first strike and lifelink.

Hornet Queen

Flying
Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
When Hornet Queen enters the battlefield, create four 1/1 green Insect creature tokens with flying and deathtouch.