When you dash back of your own accord (not if your champion has an evasion ability that triggered), you will get hit with a Bleed, that can stack with multiple dash-backs. Just use Bleed immune champions, or at least heavily resistant ones.
caltrops were pointed sharp bits of metal that in medieval times were uses to maime horses. Basically dashing back over them causes you to bleed out very quickly.
I did great with King Groot , he is bleed immune and has a fantastic regen , the fights may get a bit long but you can actually do the whole path with him and still be 100% health (except for Electro y used an archangel for him)
Comments
Ah okay, sorry. And yeah the descriptions in the game do help.