when do you get inspiration as a rune page

Certain champions benefit from the tree as well as when you are looking to pull off some cheese, especially with Unsealed Spellbook. Kleptomancy Gangplank, Glacial Augmentation on MANY ranged Top Lanes and a few other champions, and Unsealed Spellbook for champions that really more than others on Summoner Spells, like Ghost-reliant characters and a few characters that rely on Flash to close the gap to burst/initiate, like Annie and a few others.

No, you get auto assigned first, then you can choose between the other 4 (premade), then later you can make your own. Not sure when that is tho.

When you like having an incredible early game. I take Glacial Augment on Renekton; it rocks! He's actually useful come lategame now with it and BORK haha.

What I mean by incredible early game is that you get bonus potion and elixir duration AND you get some cheats for laning phase like clearing a wave for absolutely free or bonus movespeed toward impaired champions. The whole tree is basically "win laning phase".

Im looking for my inspiration runes to add to my custom rune page and i cannot find them! when do i get them?