Step one go to your magic book
From here you go to the agility icon
Now from level 1-35 you're gonna do the Gnome agility course
This course will grant different exp rates based on your game mode so i'm not going to go into detail on that.
From level 35-52 you're going to do the Barbarian course
And from level 52-99 you're going to do the agility course in the wild (As you can see it's in 52 wild, so don't bring your bank kek) There is however a portal to home at the entrace of the course for a quick get-away.
For the full set of graceful it's going to cost you 1,050 Marks of Grace.
To redeem your marks simply click on them and it will give you a menu for what piece of graceful you want (or a stamina pot for 15 marks, however i wouldn't recommend that.)
Instead of stamina pots you can use energy pots (They only restore 10 run energy, but can be bought cheaply with gp.)
Added note: Gnome course grants 1 mark per lap, barbarian course grants 2 marks per lap, and wildy course grants 3 marks per lap.
Enjoy the grind to 99 agility!
