Ritualist

You lack the ability to shape magic as other casters do and so you make use of runic ritual circles to cast for you. You channel your arcana into a string of runes created by your magical chalk which in turn casts the target spell. 

Level 3: Ritual casting

Starting at 3rd level, you gain the ability to cast all spells from the Warlock spell list as rituals at the levels stated below using intelligence for your spellcasting ability modifier

Rogue level	Spell level
3	1
5	2
9	3
13	4
17	5

Magic chalk

You gain proficiency in Intelligence (Arcana) checks. Additionally you can manifest a piece of magic chalk that can be used to create rune circles in the air. This is treated as your spellcasting focus when casting ritual spells. Ritual spells cast using this chalk do not require concentration so long as the circle remains undamaged. A creature can disrupt the circle by making an arcana check vs your spell save DC.

For spells with a range of “self” or “touch” the target(s) can be anybody within the circle at the time of the cast. Rune circles can have up to a 15ft radius, increasing by 5ft every rogue level past 3rd.

Level 9: Rune Scripter

Starting at 9th level at the end of casting a spell as a ritual you can choose to give the spell a delayed casting upon a certain trigger that is set by you. Additionally the time it takes for you to cast rituals is lowered by an amount of minutes equal to your proficient bonus.

Level 13: Psyche ward

At 13th level your runes defend themselves against attackers. When a creature fails its arcana check to disrupt the circle they take psychic damage equal to half your sneak attack damage.

Level 17: Runic waypoint

At 17th level you have gained enough mastery to maintain a permanent rune circle which has a DC equal to your spell save DC + your proficiency bonus. By spending 12 hours setting up a complex set of runes you create a permanent rune circle, which has 2 primary uses.

- Once per long rest by spending 10 minutes you, and an amount of creatures up to your intelligence modifier (minimum of 0) may teleport to your rune circle.

- When casting a ritual spell you may choose to cast the spell using the normal casting time as if you were in the location of the rune circle

Additionally the permanent rune circle can be of a size up to 10x your normal rune circle limit