Sol Ring

Jeweled Lotus

{T}, Sacrifice Jeweled Lotus: Add three mana of any one color. Spend this mana only to cast your commander.

Goblin Matron

When Goblin Matron enters, you may search your library for a Goblin card, reveal that card, put it into your hand, then shuffle.

Goblin Chirurgeon

Sacrifice a Goblin: Regenerate target creature.

Price of Glory

Whenever a player taps a land for mana, if it's not that player's turn, destroy that land.

Goblin Chieftain

Haste (This creature can attack and {T} as soon as it comes under your control.)
Other Goblin creatures you control get +1/+1 and have haste.

Krenko, Mob Boss

{T}: Create X 1/1 red Goblin creature tokens, where X is the number of Goblins you control.

Blood Moon

Goblin Warchief

Goblin spells you cast cost {1} less to cast.
Goblins you control have haste.

Sensei's Divining Top

{1}: Look at the top three cards of your library, then put them back in any order.
{T}: Draw a card, then put Sensei's Divining Top on top of its owner's library.

Fervor

Creatures you control have haste. (They can attack and {T} as soon as they come under your control.)