太（たい）陽（よう）電（でん）池（ち）アレイ

{T}: Add one mana of any color. When you next cast an artifact spell this turn, that spell gains sunburst. (If it's a creature, it enters with a +1/+1 counter on it for each color of mana spent to cast it. Otherwise, it enters with that many charge counters on it.)

Sothera collapses, but its light is not yet gone.