Number of Aisles
You're getting three packs with this blister, so the odds aren't great at opening something good, but there's always the chance you crack a chase rare or fancy ex card
For the curious, the old deck is archived here At this point, Eureka puts half your hand into the battlefield (Opalescence, March of the Machines, Minion Reflector, Doubling Season, Phyrexian Altar, Hanna, Ship's Navigator, Rings of Brighthearth, Vedalken Orrery, Mirror Gallery Norritt, Hana Kami, Deathknell Kami, Elder Pine of Jukai, Rootrunner, Forked-Branch Garami, Nightsoil Kami, Vine Kami, Thousand-legged Kami, Body of Jukai, Kiki-Jiki, Nature's Revolt, Karakas, Hunted Lammasu, Holistic Wisdom)
Combined With Mega Lucario Ex, It's Massive Damage Against Opponents Up To 390 Damage In A Single Attack Mega Lucario ex in Mega Evolutions is a Fighting-type, with two moves, "Aura Jab" and "Mega Brave." The former causes 130 damage, which is nothing to laugh at, but the latter ability causes 270 damage and requires only two Energy
You want to flip Elesh Norn back and forth without wasting mana on its activated ability, so changing it into an artifact with Liquimetal Torque, Liquimetal Coating, Mycosynth Lattice or Encroaching Mycosynth opens up a lot of options for Tetzin