Thick Skin

Yes. Clover Time [SHADOW GRIMOIRE] is a free Roblox experience by AnimeCore Studio. Optional Robux items exist, including a Grimoire Bag reported at 469 Robux and a Big Starter Bundle reported at 2599 Robux. The opening quests, the first tower roll, and the first broom do not require them.

Spins and Special Spins reroll Race, Social Class, and Trait at the Hage Priest or in Menu, Customize, Rolls. Crystal Mana, also called a Mana Crystal, is spent at Grimoire Tower. One crystal is one tower roll. Spins do not roll books.

Open the two starter chests for the usual first Mana Crystal, follow the tower marker, and spend the crystal in the rolling area. No level gate is documented for that first roll. If the door is locked, the nearby tutorial NPC can give a key. Finral in Hage can also teleport you there for Yuls.

Grimoire skills unlock from Power in Profile, Stats. Basic M1 attacks scale with Strength. Chain's last skill stays locked until 50 Power. The Bandit Dagger is the documented weapon that scales with Sword. Mana helps the broom stay in the air. There is no single spread for every book.

The Roblox page title is Clover Time [SHADOW GRIMOIRE] and the description says Update 1 is here. The announced additions are 1 Secret and 2 Epic grimoires, 2 bosses, 3 quests, and the Royal Capital. Names for those new books and bosses were not published in the records read for this wiki.