If you don't have a legendary creature out or need to refill your hand, you can dig through the top four cards of your deck to take as many legendary cards as you like, and create Treasure tokens for each card you don't take
Creature removal Smaller destruction instant spells are Return to Dust and Swords to Plowshares, the former targeting an artifact or enchantment (even two when its played in your own main phase), the latter targeting a creature
8 Rite of Replication We can all agree that the Clone Saga was bad, but it was still a massive story in my formative comic book reader years (I'm sure you'll have noticed a trend by now)
They were a slam dunk when they hit the scene, and theyve been reworked and adjusted in so many sets since
When Elder Brain attacks next time, we get more
Starter decks are meant for beginners after all