The photo above shows a Machamp with the 1st edition logo (sadly, not a shadowless card!) Naturally 1st edition shadowless are much rarer and so have greater value
There are some chinks in the armour in this combo that opponents can exploit
Their combo is assembling Tron as quickly as possible with the help of a ton of land tutors (Expedition Map and Sylvan Scrying) and cantrips (Chromatic Sphere, Chromatic Star, and Ancient Stirrings) and then having Karn Liberated (and other big colorless cards) provide the combo finish
The mana could also go towards land destruction spells such as Acidic Slime, Reap and Sow, and Woodfall Primus, to prevent control decks from stopping Thrun with Iona, Shield of Emeria
The design team decided that the card felt better if the effect happened immediately, as then it made the scry feel more relevant