Corusant

At the start of each main phase, you gain
4 life and add {3}{g/u}. {t}:Add {8}{u/b}{u/b}
Spells you cast cost {3} less to cast
Spells your opponents cast cost
{2} more to cast. Starships you control
gain persist and lifelink.
{p/b}{p/u}:Untap target planet.You can
only use this effect once per turn.