With its expansive set of over 190 cards, including 15+ Trainer cards and several special illustration Pokmon and Trainer variants, it quickly gained attention
In addition, Zagras can be an effective way to remove Planeswalkers given that he has flying and haste, and when he or any other of our creatures deal combat damage to a planeswalker it is immediately destroyed
Until end of turn, that player can't cast spells, you may look at the top card of their library any time, you may play the top card of their library, and you may spend mana as though it were mana of any color to cast spells this way.
Chapter II protects you from early aggression, and Chapter III should draw you at least two cards and potentially more (say, an opponent is playing mana creatures)
Masters 25: Uncommons / Commons / Bulk While lacking one super-chase uncommon in the vein of Mishra's Bauble, if you look at the uncommon slot of Masters 25 as a whole, it is very likely the best group of uncommons we've seen in a Masters set, at least since the original Modern Masters
Stay safe, and keep stacking those counters