As well as the initial tutorials, there are more lessons available - one for each of the mana colours - known as Color Challenges
Pay close mind to what Teleportation Circle can flicker, and consider Dungeons, because theyre not only good value, but a number of rooms let you target Agrus to put +1/+1 counters on him (and vis-a-vis the team) with only the two mana to copy the ability
Chandra, Torch of Defiance is incredibly powerful, and the decks that use all her abilities will be rewarded very nicely
Extended art foil One Rings are obscenely expensive, but actually cannot be found in Collector Booster packs
The cards need to still be powerful or at least playable as they need to still be competitive versus other cards
And seriously, Dark Intimations has never been as good as it is in this deck