The ability to draw three cards as an instant for four mana (or at least the best one or two of five) coupled with a certain Psychatog made for one frustrating experience for the unlucky opponent who had to make piles which often foretold doom
Ravenloft Adventurer and Passageway Seer help round out your curve with Rilsa Rael, Kingpin topping it off
Legendary Creature - Human Assassin Jacob Frye Partner with Evie Frye (When this creature enters, target player may put Evie into their hand from their library, then shuffle.) Whenever one or more Assassins you control deal combat damage to a player, exile up to one target Assassin card or card with freerunning from your graveyard
Whenever another of your creatures dies, Pitiless Plunderer creates a treasure token
The MAT set brings about several impactful changes to the Magic Multiverse, from planeswalkers losing their Sparks to the formation of Omenpaths
Keep this in mind when I start lashing out at reviewing some of the weaker battles, since my perspective would mostly be in constructed formats