Solar Array is a rare Artifact card from Edge of Eternities Commander (EOC), collector number 18. Current market price: $0.24, TCGplayer market prices via Scryfall.
{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.)