how to tell the value of yugioh cards Discovering Hidden in Old Yu-Gi-Oh What is the best place

While it only affects artifacts and creatures, the effect is instant, and is reliable enough given the amount of both in your average Commander decks

The Mewtwo ex card depicts a very different atmosphere

Remove from play a number of card(s) in your Graveyard equal to the number of counters on this card to destroy that same number of Spell or Trap Card(s) on the field

It's a Trap Raigeki (most of the time, your opponent's monsters won't have an A-Counter until your turn unless you have Kid or recently played PPV) and generates free counters on everything your opponent Summons, which is nice for turning Telepath into MST or even a sudden Brainwashing Beam, though Beam is kinda situational

Great value at $42

In a single day, buyers purchased more copies of this card than had sold in the previous five months, with an average of 33.1 copies per buyer