Miv Nizzets Rebirth

If a player casts a multicolored spell, they gain
3 life, each of their opponents loses 3 life
{p/b}{p/g}{p/r}{p/u}{p/w}: Create a 6/6 Legendary Dragon
named Miv Nizzet that has when this creature
attacks search your library for a creature, instant,
or sorcery card with mana value less than
or equal to the number of colors of mana
spent to create Miv Nizzet