This means you're about 2.9 times as likely to see a copy of any given Common as you are to see a copy of any given Uncommon, 2.4 times as likely to see a copy of any given Uncommon as you are to see a copy of any given Rare, and twice as likely to see a copy of any given Rare as you are to see a copy of any given Mythic
You can cheat by proliferating counters, like with Azors Elocutors, but Okaun and Zndrsplt decks can often put ten counters on it with one good turn
Generating a huge amount of card draw along with an eventual boost to mana production and recursion, Tamiyo truly stands out in an era of MTG that has been less focused on Planeswalkers as a whole
Zhulodok may be what Emrakul was warning Jace about, or merely a small part of a greater threat
How many extra turns are your opponents willing to let you have
Collect special illustrations and 15+ new Trainer cards