Godstrike

You can get this trophy alongside Untouchable but not having enough abilities is a challenge in itself so if it's not working out, getting them separate will work just as well. 

Before you start a fight, you'll be able to choose abilities from two spellbooks; actives (on the left) and passives (on the right). For this trophy, you need to go in without any abilities equipped and win. It's not enough to just not use them, you can't have any equipped period. The best boss I found to do this on is of course the first one, Tutoriaal, as you really don't need any abilities to take him down. The hardest part will probably be dodging projectiles when he surrounds himself with the rotating rocks but other than that, he's a pretty easy boss. Once you defeat any of the bosses without equipping any abilities, the trophy will unlock.  If you need a visual reference for this trophy, please see Untouchable . The video provided under that trophy shows both trophies being earned together against Tutoriaal.