Collection boxes still available
In addition to choosing the right cards, you need to consider the balance between attack, defense, and special abilities
There is one on Ebay in worse condition with seemingly less dark borders as well, and was told by some seasoned error collectors that PSA even graded one at one point
--- Card Scanner With Auto Centering Detection --- Scan or upload your card and let the app automatically detect the card edges and calculate centering ratios
Even if you just manage to get a single counter on each enemy, you can then rely on proliferate abilities from cards like Throne of Geth or Karn's Bastion to put pressure on them
To determine the total cost of a spell, start with the mana cost or alternative cost you're paying, add any cost increases, then apply any cost reductions (such as that of the effect of the chapter III ability)