Fireshrieker

Equipped creature has double strike. (It deals both first-strike and regular combat damage.)
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Frogmite

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)

Galvanic Key

Gate to the Aether

At the beginning of each player's upkeep, that player reveals the top card of their library. If it's an artifact, creature, enchantment, or land card, the player may put it onto the battlefield.

Gilded Lotus

Goblin Charbelcher

{3}, {T}: Reveal cards from the top of your library until you reveal a land card. This artifact deals damage equal to the number of nonland cards revealed this way to any target. If the revealed land card was a Mountain, this artifact deals double that damage instead. Put the revealed cards on the bottom of your library in any order.

Goblin Dirigible

Flying
This creature doesn't untap during your untap step.
At the beginning of your upkeep, you may pay {4}. If you do, untap this creature.

Goblin Replica

{3}{R}, Sacrifice this creature: Destroy target artifact.

Goblin War Wagon

This creature doesn't untap during your untap step.
At the beginning of your upkeep, you may pay {2}. If you do, untap this creature.

Roar of the Kha

Choose one —
• Creatures you control get +1/+1 until end of turn.
• Untap all creatures you control.
Entwine {1}{W} (Choose both if you pay the entwine cost.)

Gold Myr

Golem-Skin Gauntlets

Equipped creature gets +1/+0 for each Equipment attached to it.
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Granite Shard

{3}, {T} or {R}, {T}: This artifact deals 1 damage to any target.

Grid Monitor

Heartwood Shard

{3}, {T} or {G}, {T}: Target creature gains trample until end of turn.

Hematite Golem

{1}{R}: This creature gets +2/+0 until end of turn.

Mirrodin