/chanserv op (channel) (-)(nick)
NOTE: you do not need to use parentheses.
/chanserv op #dragonrealm FlameMage
After typing this command, ChanServ would not send you a personal notice, like it normally does, but you would see this on the channel:
*** Mode change "+o FlameMage" on channel #DragonRealm by ChanServ
Accordingly, this command:
/chanserv op #dragonrealm -Lydian
Would result in seeing this on the channel:
*** Mode change "-o Lydian" on channel #DragonRealm by ChanServ