There are even cards like Brasss Tunnel-Grinder that can enable enormous hits out of nowhere
Create X 1/1 white Vampire creature tokens with lifelink, where X is the number of other attacking creatures
Treasure Mage Treasure Mage is the first of an ongoing vertical cycle of blue creatures that tutor for artifacts with specific mana values
So at worst you have a 6/6 samurai, but at best you hit a living weapon, job select card, For Mirrodin!, Meteor Sword, Embercleave, and the nasty Nazgl Battle-Mace
Then, being able to cast anything from your graveyard on your turns allowing for you to build your own version of Amaurot is just incredible
Draw a ton of cards, and then you have no hand size requirements while you do