Hollow Knight

The False Knight will most likely be the first boss you encounter, if you haven't found Gruz Mother first. He is located in the Forgotten Crossroads area and is required to beat in order to get the Vengeful Spirit spell. It will swing its large mace at you and hit the mace on the ground to create a shockwave. Dodge the swings at you and jump over the shockwaves. Sometimes he will jump to you and even approach you. Dodge his hits while dealing damage with your Nail and make sure not to run into him as it will cause damage to you. Once enough damage is done, the maggot inside the armour will reveal itself allowing you to get a few hits in but once he goes back into the armour, he will go to the centre of the arena and start slamming his mace on the ground which will send projectiles falling from the ceiling. Avoid these as best you can but if you're confident, you can focus to heal any damage during this time. Once enough damage is done to him, the floor will cave in and the maggot will burst from the armour dead, earning you the trophy.