Nightscape Familiar
Creature — Zombie
Blue spells and red spells you cast cost less to cast.
: Regenerate Nightscape Familiar.
Nightscape masters don't stop at raising the spirit of a fallen battlemage. They raise the flesh along with it.
Illustrated by
World Championship Decks 2002#cr48CommonEnglishLegality
Rulings
If a spell is both blue and red, you pay less, not 
less.
The generic X cost is still considered generic even if there is a requirement that a specific color be used for it. For example, “only black mana can be spent this way”. This distinction is important for effects which reduce the generic portion of a spell’s cost.
This can lower the cost to zero, but not below zero.
The effect is cumulative.
The lower cost is not optional like with some other cost reducers.
Can never affect the colored part of the cost.
If this card is sacrificed to pay part of a spell’s cost, the cost reduction still applies.