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 slightly different take on Songhai aggro that makes maximum use of positioning tools.
Summon some minions, stack phoenix fires, burn, burn, BURN!!!!
GAMBLER IS GOD
A midrange/combo deck that is even or favored versus wanderer, fault zirix, and combo ragnora.
A very fast, fun, satisfying and extremely difficult deck to play
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.
Meziljie won Meltdown League Season 2 with this deck.