When it comes to Gods, they're often to know for their grand power, long-lived life and ability to change the world in it of itself. Every god also has there "Special move" so to say and it's all written down in the Way of the God Series. You must only find it of course; it could be deep below in the Dungeon, hidden behind a bookshelf in an old Sanctum, in the belly of an Old Dragon or even laying upon its massive horde of Gold. A smaller deity but gains power over time Invictus the Blood God (War, Death). Often seen near Battlefields and Monuments made for him: This Orange two head Ram with horns at the top and bottom of its head, with the eyes and mouth of the green Firey blade: This monstrosity loves to make and break deals for its own gain. Any creature that comes in contact with Invictus must make a wisdom saving throw of 19 to not become frightened if the save was a success the creature becomes immunes to this effect from it. Once becoming its Champion through his trials you're able to learn this spell. 

Blood Sacrifice: Lifting a Weapon, Shield or even your open Spell book allows you to start conjuring all blood within you. Visually your comrades would see a purple haze fall around you: as moments later blood will spew out from your armor to the ground slowly seeping into it. The ground would shake as a sinkhole will open releasing the Dragon. This attack will happen once it summoned. This is counted as a surprise attack and is an automatic Critical hit. The Dragon will hunt down its foe that the user conjured it for: The Dragon will only disappear when the foe is dead, or if it dies. When it breaches the ground from its arrival any creature in a 90ft from its breach must make a Strength save of 23 or take 6d8 bludgeoning damage and be knocked prone. The Blood Dragon has its own initiative and when it first arrives upon the battlefield it automatically gains the attention of all foes in a 30ft radius around the sinkhole. This spell causes the user to lose all his or her blood dropping their health to 1 and gaining 5 Exhaustion.                                  

 See Blood Sacrifice Dragon in the homebrew section for more details