Jumping into TCGs for the first time with Ruby/Emerald might not be the best move, for example, but it's an excellent choice with the right tactics
All of these factors are preventable with proper conservation practices
4 Knightmare Link Monsters Swoop-In In A Pinch Knightmare Link Monsters can fit into any deck and can provide a quick means of destroying annoying floodgates or field spells in a pinch
You want to sacrifice lands to remove the stun counters from this card while creating 4/4 tokens, so that you can attack with your 10/10, and you have the means to do so on the card
While Thrill of Possibility wont increase the card quantity of your hand, it could increase the card quality of your hand if you discard a card you werent going to use anyway
but the problem there is, as mentioned above, deck space to fit in spell/trap removal and protection in a 20 card deck