The quick answer is the sets that are about to rotate out of Standard tend to be the cheapest
More previews at mtgpreviews.com #MTGxLOTR Source: youtube.com/watch?v=-hmaJk A cheap uncommon legend to turn all those Amass orcs into card draw or mana
Card Text 2 [Inherited Effect] [When Attacking] [Once Per Turn] By suspending 1 of your [Rhythm], unsuspend this Digimon
Pull rate from Regular Packs: 0.15% The estimated pull rate for Pokmon Center Lady (Shining Revelry) from a Regular Pack is approximately 0.15%, meaning you might need to open around 686 Regular Packs to obtain it

The deck: Orc Tribal Comparative Analysis 35 Lands 11 Ramp : Relic of Sauron, Arcane Signet, Sol Ring, Burakos, Party Leader, Patchwork Banner, Treasure Nabber, Rakdos Signet, Izzet Signet, Sanar, Unfinished Genius, Tablet of Discovery, Mana Sculpt 15 Target Removal : Foray of Orcs, Feed the Swarm, Goblin Cratermaker, Fall of Cair Andros, Sarumans Trickery, Orcish Bowmasters (ping+), Brush Off, Fling, Souls Fire, Kazuuls Fury, Jwari Disruption, Self-Destruct, Pain for All, Artistic Refusal, Mana Sculpt 6 Board Wipes :Subjugate the Hobbits, Widespread Brutality, Blasphemous Act, Chandras Ignition, Nibelheim Aflame, Soul Immolation 4 Graveyard Recursion : Summons of Saruman, Treason of Isengard, Sauron, Lord of the Rings, Kess, Dissident Mage 1 Graveyard Hate : Bojuka Bog 2 Tutors : Waterlogged Teachings, Sanar, Unfinished Genius 6 Protection : Mana Sculpt, Sarumans Trickery, Whispersilk Cloak, Brush Off, Jwari Disruption, Artistic Refusal 10,5 Card Draw : Desolate Lighthouse, Relic of Sauron, Sauron, the Dark Lord, Artistic Refusal, Moria Scavenger, Deep Analysis, Faithless Looting, Thrill of Possibility, Moria Marauder, Plargg and Nassari (kinda), Rush of Inspiration, Tablet of Discovery (1/2) 13 Finishers/ Surprise /Alternate win conditions : Assault on Osgiliath, Fling, Kazuuls Fury, Port Razer, Souls Fire, Infantry Shield, Isengard Unleashed, Chandras Ignition, Essence Harvest, Self-Destruct, Pain for All, Soul Immolation, Muddle, the Ever-Changing As we see form the comparative analysis, the rates per category are very good
