Still worth playing though, as SGL has gotten a bit pricey for an uncommon
Total packs opened, cards seen, and cumulative value all add up across your session, so you can simulate the experience of cracking a full Collector Booster box, Play Booster box, or Draft Booster box
Meanwhile, Tainted Indulgence and Thirst for Discovery each draw at least two cards at instant speed, so all by themselves, they can trigger all of our payoffs during our turn or at instant speed during our opponent's turn
Without the Color Challenge making me try different mana types, I wouldn't have discovered the love of my MTG life
Now Japanese are little different
Two things make Guide of Souls good: first, its cheap mana cost and the additional resource it creates when it triggers make it on-par or better than our Soul Warden