MortalPlague
Adventurer
Yep. What Scorpio616 said.
a sorceror can quicken and still cast this spell, it's ok for them. As for warlock... hmmm... yeahhhYes EK's and valor bards can gain some situational use, it still doesn't explain why it is on the warlock or sorcerer spell lists except as trap options.
Guidance and resistance are both concentration cantrips, much to the chagrin of Tome Pact warlocks everywhere who are fond of their hex spell.I don't think there are any concentration cantrips. I think that was one of their "rules".
It's a good cantrip for Valorous bards and Eldritch Knights (and multiclass characters with levels in these). A creature reduced to 0 speed (such as a restrained one) is incapable of Dodging, so a wizard caught in a net, an entangle spell, or web spell would be thankful to have this cantrip to stave off attacks for a round.
A high elf (or any character with Magic Initiate) rogue could also cast this cantrip, then use his Cunning Action to Dodge and then move with virtual impunity through a barrage of opportunity attacks or traps for a round.