That's very useful for two cards in particular: Beren and Luthien, which lets you make minions Strength -1 if there are Elf cards beneath your draw deck, and more importantly The Underdeeps of Moria
This years Tales from Middle Earth was a stand-out success for Universes Beyond
If you play a Tome Scour, you are casting a zero-for-one
Worldslayer This card from Mirrodin is as ridiculous as youd expect, considering its called Worldslayer
If you do, they draw a card before its other effects.) Target opponent sacrifices a creature with the greatest power among creatures they control
Its hard to really combo off with Szarekh because his trigger is tied to attacking, but when the rest of the deck is so explosive (and trust me, it is), sometimes you just need a Commander who can keep you supplied with fresh options