If youre worried about these cards, a Herdier in play, or a Lillipup with a Rare Candy in hand and a Stoutland, is sufficient
This is paired with a spell card that lets him draw three cards every time a monster is special summoned to the field, another spell card that eliminates the usual five-card-in-hand limit, and a slime monster that automatically revives when killed, triggering the special summon condition, and takes any hit intended for the dragon
Overall, Im not sure which version of white-based magecraft aggro is best, but it seems to me like there are enough ways of building the decks and enough potential in the card combinations that Im going to spend some more time figuring them out
Finding an opening hand with access to green, mana rocks or some early accelerants like Abundant Growth, Selvala, Tiller Engine or any of the numerous green ramp spells should be your goal