Anytime you cast an instant or sorcery from your hand specifically during an opponents turn, you suspend it with three time counters when it resolves
I think its great in the 99 of decks like Minsc & Boo, Timeless Heroes and Rosheen, Roaring Prophet
[Update: Didn't notice till later, but the pro membership that costs 1.70ish a month actually charges you for the entire year instead of the monthly fee listed
For this reason, Potions are a superb counter, letting your Pokemon stay alive just one turn longer, enough to turn the tides and gain two points while giving one or to simply stall while your own Mewtwo ex or Alakazam gets fed while on the bench
I think folks will get that wrong when evaluating this
In my Commander decks, its harder to find a card that cant be flickered for significant value