: Add . Spend this mana only to cast an instant or sorcery spell.

: Add one mana of any color.

: Add two mana in any combination of colors. Spend this mana only to cast Lesson spells.

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

: Add two mana of any one color. Spend this mana only to cast artifact spells or activate abilities of artifacts.

: Add . Spend this mana only to pay a disturb cost or cast an instant or sorcery spell.

: Add . Spend this mana only to foretell a card from your hand or cast an instant or sorcery spell.

: Add two mana in any combination of colors. Spend this mana only to cast instant or sorcery spells.

Whenever you cast your third spell each turn, exile a random card from your library. Until end of turn, you may play that card without paying its mana cost.

Rulebreaker — If Daxiver, Izzet Electromancer is your Commander, you may include instant and sorcery cards of any color in your deck regardless of color identity.

: Add one mana of any color. Spend this mana only to cast instant and sorcery spells.

: Add one mana of any color.

: Add two mana of any one color. Spend this mana only to cast spells from your graveyard.

, , Exile this creature: Return target card with flashback you own from exile to your hand.

: Add . Spend this mana only to cast a colorless spell or to activate an ability.

: Add . Spend this mana only to cast an instant or sorcery spell.

At the beginning of your upkeep, if there are three or more instant and/or sorcery cards in your graveyard, transform this creature.

, : Target creature gets +2/+0 until end of turn.

, : Add one mana of any color.

Whenever you cast a creature spell with mana value 4 or greater, you draw a card, gain 1 life, and put a +1/+1 counter on Helga.

: Add X mana of any one color, where X is Helga's power. Spend this mana only to cast creature spells with mana value 4 or greater or creature spells with in their mana costs.

Flying, ward

When this creature enters, for each player, choose up to one other target artifact or creature that player controls. For as long as this creature remains on the battlefield, the chosen permanents become Treasure artifacts with ", Sacrifice this artifact: Add one mana of any color" and lose all other abilities.

: Add . Spend this mana only to cast an artifact spell or activate an ability.

Whenever Bill Ferny becomes blocked, choose one —

• Create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")

• Target opponent gains control of target Horse you control. If they do, remove Bill Ferny from combat and create three Treasure tokens.

Flying

: Add . Spend this mana only to cast an artifact spell.

: Add . Spend this mana only to activate abilities of artifact sources.

Flying, vigilance

: Add . Spend this mana only to cast an artifact spell or activate an ability of an artifact source.