Magic Circle Mastery

You learn the Magic Circle spell if you have not already and can cast both the regular and inverted version as a ritual

When casting this spell as a ritual you can use cheaper spell components (refined salt and powdered iron worth 25GP,) but the duration is 1/4th. More expensive components can be used to increase the duration based on the cost/100. Time needed to complete this ritual is halved. If a creature tries to use teleportation or interplanar travel to bypass the circle, it has disadvantage on its Charisma saving throw.