The Mewtwo pack comes in second , providing two Bulbasaur, which are necessary for the Venusaur ex archetype, as well as Marowak ex, a couple Cubone, and Dratini
There are some really great instants to grab like Boros Charm, Lightning Helix, and Warleader's Helix
If this ability targets another creature than the one with backup, the targeted creature also gets the ability printed below backup until end of turn
As you might expect, one of the easiest ways to check the value of a card is to look it up on an auction site like eBay
Alternatively, you could head over to your nearest LGS, or even check out Wizards the Coasts Official store on Shopee that still has the pre-con bundle for sale