Darth Sidious, the Emperor

For each colored mana you would pay to cast Legendary spells, you may pay 2 life instead.
Whenever you cast a Legendary spell, you may
unturn Darth Sidious, the Emperor.
{u}{u}{t}: Surveil 2
{b}{b}{t}: You lose 2 life and you draw a card.
{r}{r}{t}: Target creature you control fights target creature you don't control.