Astrella's Rest

Astrella's Rest enters the battlefield tapped.
{t}: Add {1} to your mana pool.
Discard a non-land card, {t}: Put one mana of
any color that shared a color with discarded
card in your mana pool. If that card had five
colors, add {w}{u}{b}{r}{g} to your mana pool
instead.
Forever in mourning for the fallen goddess.