Seeing heavy play in Standard, the Elder Dragon enters with a Treasure token, with the option of casting Instant/Sorceries off your artifacts
Enchanted creature has "Whenever this creature attacks, if its toughness is 3 or less, put a +1/+1 counter on it.") If you don't choose a target for Protective Parents's ability, the Young Hero Role token won't be created
Some individual cards can come close to $100 each, with an entire set going for well over $500
You should also consider your deck's mana curve, win conditions, and strategy
Players can acquire mana by playing land cards, with the different types of land cards fueling cards of the corresponding colour
Its a great early play that can help you get access to the colors you need and stay slightly ahead on lands