Volshe Tideturner

{T}: Add {U}. Spend this mana only to cast an instant or sorcery spell or a kicked spell.

Goblin Electromancer

Instant and sorcery spells you cast cost {1} less to cast.

{T}: Add one mana of any color in your commander's color identity.

During turns other than yours, spells you cast cost {1} less to cast.

Whenever you cast a noncreature spell, create a 1/1 colorless Soldier artifact creature token.

Flying
Whenever you cast an instant, sorcery, or Wizard spell, you may draw a card. If you do, discard a card.

You may discard a card. If you do, draw a card. (Then exile this card. You may cast the creature later from exile.)

Whenever you cast an instant or sorcery spell, Guttersnipe deals 2 damage to each opponent.

Whenever you cast a noncreature spell, put a +1/+1 counter on Spellgorger Weird.