Research Expert

You have honed your proficiency with particular skills, granting you the following benefits:

• You gain proficiency in two skills of your choice.
• Choose two intelligence skills in which you have proficiency. You gain expertise with those skills, which means your proficiency bonus is doubled for any ability check you make with it. The skills you choose must be one that isn’t already benefiting from a feature, such as Expertise, that doubles your proficiency bonus.
• When you make an intelligence ability check you can roll an additional d20. You can choose after you roll the die, but before the outcome is determined. You choose which of the d20s is used for the ability check. You can use this feature once per long rest.