Circrux of the Elements

Sunburst, Chromaburst (As this creature enters, note each color of mana spent to cast it. This creature is each of those colors)

Cards, spells, and permanents are white in addition to their other colors if Circrux is white. The same is true for blue, black, red, and green.

{w}{u}{b}{r}{g}{t}: You may cast an instant or sorcery from your hand with mana value X or less without paying its mana cost, where X is Circrux's power. Copy that spell if it is 3 or more colors. You may choose new targets