Get into the fray and activate and go robo on their ass.

This is the deck I’ve primarily been using. it uses only starting cards/cards you get via level up

A budget Zirix deck with only basic cards, so you can get it almost from the start!

Ciphyron 1k spirit with only commons made by Hsuku and played to S-rank on a new F2P account in May 2018 during his From Zero to Hero (FZTH) series

A build of Tempo Sajj with a slight emphasis on big minions. Uses no cards above rare.