Aegir’s Eye of the Tempest

Look at them. They toil and resist against my might. It pleases me to know that these are only the precursor winds before the maelstorm." God of Storms Aegir.

This magnificent warhammer has been blessed with the fury of the storms at sea that have claimed countless souls since the dawn of creation. It has an adamantine shaft that has been decorated with runic carvings in giant, reliefs of monstrous entities of the sea, and where the shaft is covered in shark skin, bordered by the teeth of a fallen kraken. The head of this mighty hammer is hewn from the skulls of two water drakes, their maws biting down an two enormous Obsidian Pearls that the Storm God himself drew forth from the depths of a subterranean volcanic pit. The weapon is considered magical with a +5 bonus to attack and damage rolls. When a creature that is attuned to this weapon successfully hits a target, the weapon deals its normal damage and an additional 2D8 Thunder and 2D8 Lightning damage. On a Critical, the attuned creature rolls an additional D20, and on a roll of 18 or higher, the hammer bursts with divine fury, casting the Chain Lightning spell at 7th level.

While you are attuned to this weapon and holding it, your Strength score increases by 4 and can exceed 20, but not 30.
Leviathan’s Bane: When you roll a 20 on an attack roll made with this weapon against a huge or larger enemy, the enemy must succeed on a DC 17 Constitution saving throw or die.

Soul Bound: Once attuned the wielder’s soul becomes bound to the hammer, and must take all long and short rests while residing with in the hammer.  Also upon falling unconscious the wielded is pulled defensively into the hammer.

Proficiency with a Warhammer allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Bonus: Magic, Bonus: Strength Score, Bonus: Magic, Damage: Lightning, Damage: Thunder, Damage, Combat, Versatile, Push