You need these faction levels to unlock the cards. You can achieve that by playing against the AI.
Lvl 2 needed for Inner Focus
Lvl 7 to get Ghost Lightning
Taken from my only basics deck lists:
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A very fast, fun, satisfying and extremely difficult deck to play
Meziljie won Meltdown League Season 2 with this deck.
GAMBLER IS GOD
Summon some minions, stack phoenix fires, burn, burn, BURN!!!!
A midrange/combo deck that is even or favored versus wanderer, fault zirix, and combo ragnora.
A slightly different take on Songhai aggro that makes maximum use of positioning tools.
This deck should serve as a good teaching tool for the Songhai playstyle of contesting board early, before ceding it in order to finish of the opponent with some direct damage or buff spells.