There are no learn cards in current Standard, so youll play the lesson cards in your main deck or sideboard, and youll treat them like youd treat any other card
With one exception at rare, all the renown numbers in Magic Origins are 1 or 2
So, now that this reprint happened, when are we seeing Dictate of Erebos again
Every turn it lives you will pull a little further ahead, it is like having a planeswalker in play
If you've never seen Nadu in action, its ability (revealing the top card of your library whenever one of your creatures becomes a target of a spell or ability, then putting it into play untapped if it's a land or putting it into your hand if it's not, twice each turn for each creature) creates not infinite but sort of functionally infinite loops with an equipment that equips for free, like Skullclamp or Lightning Greaves
For example, if it has an additional cost and you activate Deranged Assistant's ability (", Put the top card of your library into your graveyard: Add .") to pay for it, you must maintain the order of your library while you search it.
