Normal summon Trident Warrior and then special summon Comrade of Landstar. You can then use them to Synchro into a level-7 monster or keep Comrade of Landstar on the field to boost your Warrior-type beaters.
Your monsters gain ATK
I never understand Tuners with effect like this, effect that requires them to stay on the field.
The entire point of using Tuners is to use them as Synchro Material....