Now that we have a card that both enables and makes good use of Gray Merchants ability, we can start building the surroundings to make sure we have enough devotion
The highest difficulty isn't particularly high if you have even half an on-meta deck of your own (speaking as a lapsed, at most casual TCG player myself), and so once you know what you're doing they can get a bit repetitive
These three cards care about making tokens and killing non-tokens, helping you make a big board and prevent your opponents from doing the same
However, not all of them are straightforward, as some cards need specific conditions to be met so that they can use their powerful effects
Attach a [P] from your hand to 1 of your Latias in play
This mainly defensive deck makes use of opposing monsters as either a form of damage output or Fusion material