Guildmasters give more info about guild abilities, prerequisites

[Rias]

Asking guildmasters about abilities will now give you a list of all available guild abilities (that you haven't already learned), regardless of whether you're eligible to learn them or not. Abilities that you have met all the prerequisite requirements for are marked by a green asterisk (*).

Asking guildmasters about specific abilities will now inform you of any prerequisites there may be to learn the ability.