as a disciple of yhidra you can become a body for her divinity to shine through, starting at level 3 of the fighter class as long as you are a devout follower of yhidra you can become one of her disciples and can convert control and eventually summon yhidras followers to build her army and consequently your own

her blessing

foes who attack you or your friends dont see any weakness in you 

as a bonus action for 4 turns per short rest you and your allies within 15 ft have +1 to their ac 

yhidras beauty

everyone in a 30ft radius must make a wisdom save above 16

those who fail will be controlled for 1 round, at level 15 this is two rounds at level  17 this is 3 rounds

your main can only move at 10ft per round and all you control get a -5 to their walk speed 

if controlling more than 10 people, at the end of the enemies round they can make a dc 14 wisdom save, if they pass they are no longer a follower and this can only happen if controlling more than 10 people

call upon her beauty

summon a follower for 5 rounds at level 17, 7 rounds