Colossus

Colossus is a pre-hardmode boss that is associated with the granite biome. He is intended to be fought after the Eye of Cthulu, but before a goblin army.

Summoning
To summon Colossus, use the Granite Anomaly at any time in any biome. The Granite Anomaly is made by using 3 Blue Energy Gems and 30  Granite Blocks at a demon altar. Energy gems are dropped by granite mobs from the exodus mod, such as the Granite Slime,  Granite Bat and  Spiked Granite Elemental.

Boss behavior
Colossus himself is kind of a pushover. He will occasionnally fire high damage lasers, but these move at a slow pace and are reasonably easy to dodge. The lasers occasionally inflict the player with the 'Stoned' effect, so try to avoid it all costs if you don't want to get overrun by monsters. Speaking of monsters, most of Colossus' fight will be spent dealing with his many summons, during the battle he will spawn a plethora of granite mobs such as the aformentioned Granite Head,  Granite Slime,  Granite Bat and  Spiked Granite Elemental, as well as some vanilla mobs such as the granite elemental and granite golem.

Tips
Making a large platform above Colossus and using ranged weapons is one of the easiest ways to quickly defeat him since he does not seem to have any movement abilities. Try not to get overrun by his flying summons though.

Colossus' minions still drop items when killed, this means that if the player died against him, or wants a specific item from him, they can make the summoning item again and again by solely using the loot from the fight.

When defeated, Colossus will drop some Energized bars which can be used to make a variety of equipment such as :

- Granite Tools

-An upgraded version of the granite set (which is for magic users)

-The scepter of rainfall which is used to toggle rain

-The granite reflector (EXPERT) which gives the player 6 defense and either gives you more thrown damage when you or your enemies have less health (OR) throws damage to your enemies depending on how low your health is