Ancalagon
Dusty Dragon
What you will find is that multiclassing has costs. For example, that wizard with one level of fighter? 50% of the time she will denied access to highest level spells. Level 5? welp, no fireball for you!. Level 9? Can't cast teleport, sorry.See this:
I despise class features that encourage minmaxing and multiclassing and the single greatest thing from 5e in my opinion other than bounded accuracy is the trade off of multiclassing in this edition. I accept that cantrips are a necessary evil but I do NOT like that one can take 3 levels of fighter and use Giants Might as after as a 20th level rune knight as a 3 fighter / 17 wizard/warlock/etc.
Not every class is so bad at it mind you, but I've seen enough players who've taken one level of fighter to cast in full plate as a wizard or two levels of warlock just to get agonizing blast with ZERO roleplaying reasoning to poison multiclassing for me forever, and the types of people who do that sort of stuff do NOT need more ammunition/options. But I do acknowledge that my opinion on this is perhaps a tad but extreme.
In fact, multiclassing is the best way to screw up your character in 5e - it has to be done just right.