But for cards that already exist, I don't see any realistic long-term harm in keeping them in circulation
Also you can always bring out a Number 74: Master of Blades to put pressure on them if you run the build with Harpies Pet Dragon since cards like Bear, 101, Dimensional Prison, Diamond Dire Wolf, etc target and he can not only negate those effects but also destroy 1 card on the field (Your opponents cards or like your own Sign too)
Ramp as an archetype hasnt really been represented in Standard for a while now, so a deck like this, then, is a breath of fresh air
Whilst using your gems - you can get a lot from fully completing the duel strategy solo mode - to unlock boosters from this secret pack, here are some basic cards you should look for: The White Stone of Legend: When sent to the graveyard, you can add a Blue Eyes to your hand The White Stone of Ancients: The turn this card is sent to the graveyard, you can summon a Blue Eyes from your deck Kaibaman: tribute this card to summon Blue Eyes Maiden with Eyes of Blue: When targeted by an effect you can summon a Blue Eyes from your hand, deck, or graveyard Burst Stream of Destruction: if you control a Blue Eyes, destroy all your opponent's monsters on the field There are many, many more to look out for and use, but those are just some of the key ones