Dromoka's Command is a powerhouse card that will see play in Eternal formats.
It was already a release promo, and then saw a recent clash pack reprint. It will likely see another reprint one day, but I think it's safe for a couple years.
Green/White +1/+1 counters is growing in Standard, and I think this card has the potential to reach its previous heights while still in Standard. It still has over a year left in Standard.
Original foils under $10.00 and any copies under $3.00 are a goog pickup. (For some inspiration, check out yesterday's spike on Atarka's Command, now a $12.00 rare).