Got all S ranks except horse

[Luminaro]

I just got Dragon so I didnt start him yet, but I have all S ranks other than horse. I have that one quest where you need to gallop without taking any damage. Is there some trick to this? I feel like it's impossile.

[Mymyamiaou]

Uses Rat's mana gain on health item pickups and go to a boss room. All of the breakables before it will drop health items so just gallop around them break them and the health pickups should give you enough mana to complete it.

[lieutenantkirtar]

I bought the passive that uses health for mana and leveled it up a couple of times, then just galloped around a safe area until I got it.

[Ghin]

I did the horse race with scavenge and that seemed to work

[ZeppMan217]

You can do that quest on the horse racing track, far right side of the wizard guild. You'll need the "convert health into mana" passive, which can be purchased from the shop. Step into a goo pool on the track to get slowed and have an easier time with the turns, then hold gallop to blast off.

[Luminaro]

I ended up going into the dungeon with the carrots in the ground, it turns out if you just ram into a carrot it counts for some reason lol. So I got it done. Thanks all!

[bruplex]

Once you have the Passive that allows you to trade health for mana, you can get it by just running in place (against a wall) as long as it's 10 seconds.