(Equipment, Auras you control, and counters are modifications.) Whenever you cast a spell from exile, put a +1/+1 counter on target creature you control
Now, onto Gandalf the Grey , an interesting legendary creature
Playing cards from the top of your library both preserves the cards in your hand for later use and serves as pseudo card draw that digs deeper into your deck so that you can find your bombs
To break even at this price, you'd need to hit a serialized card, but there are some really expensive ones you could pull - from a serialized One Ring worth up to $7,500, to a Last March of the Ents worth $4,000
A deck already built on Sets 9-12 cards can add Set 13 pieces without losing anything
Collector boosters are not designed for limited play