Preparations: Selective Targets
3rd-level wizard feature
When you prepare a wizard spell that targets only one type of creature, such as humanoids, you can modify it to target a different creature type. Both creature types must be: beast, humanoid, giant, monstrosity, ooze, plant, or undead. This feature doesn’t apply to conditional effects against a creature type, such as with the blight spell.
You can only prepare a number of modified spells equal to your Intelligence modifier (minimum of one) through the Preparations feature. Preparations you gain at higher level draw from this same pool. You can prepare the same spell more than once, with each preparation having the spell’s base effect or a modified effect. You can only apply one Preparations feature to a spell at a time. A modified version of a spell is never in your spellbook; you can’t cast them as rituals.
Selective Target Spells
The following spells from the wizard list are affected by the Preparations: Selective Targets feature. If a spell from another class list becomes a wizard spell for you, the DM decides if it is affected by the feature (for example, the animal friends, animal messenger, and speak with animals spells). The DM also decides for spells from other supplements. A spell that can choose a target from more than one creature type, such as the protection from evil and good spell, can’t be modified by this feature.
The spells are in the Player’s Handbook, except the beast bond spell, which is in Xanathar’s Guide to Everything.
Beast bond*
Charm person
Crown of madness
Dominate person
Hold person
Preparations: Substitute Reagents
7th-level wizard feature
When you prepare your spells, you can substitute the material components of a wizard spell with a different material component worth the same value. The substituted components are consumed if the spell consumes any of its material components.
Preparations: Square the Circle
13th-level wizard feature
When you prepare a wizard spell that affects targets in a cone, line, or sphere, you can change the shape of that area of effect. A cylinder or cube can’t be changed by this feature. The spell’s range becomes self for a cone or line, or 150 feet for a sphere.
A line converts into a cone with a length equal to half the line’s length, rounded up to the nearest 5 feet. A line converts into a sphere with a radius equal to one fifth the line’s length, rounded up to the nearest 5 feet.
A cone converts into a line with a length twice the cone’s length and a width of 5 feet. A cone converts into a sphere with a radius equal to half the cone’s length, rounded up to the nearest 5 feet.
A sphere converts into line with a length equal to five times the sphere’s radius and a width of 5 feet. A sphere converts into a cone with a length equal to twice the sphere’s radius.