Chromatic Obsidian Greataxe

Alter:This prismatic greataxe is made using chromatic obsidian, a dazzling type of stone found where several Elemental Planes meet. You gain a +1 bonus to attack and damage rolls made with this magic weapon. When you roll a 20 on an attack roll made with this magic weapon, the targety must make a DC 15 Constitution saving throw. A target takes 1d6 cold damage, 1d6 fire damage, 1d6 lightning damage, and 1d6 radiant damage on a failed save, or half as much damage on a successful one. Roll the damage dice seperately, recording any 6 you roll. For each 6 you roll in this way, use the table below to determine which of the effects on the table apply.

Attunement: Yes
Rarity: Rare
Type: Greataxe
 Cost: 1080gp

Griffons Saddlebag, Vol II

Damage Type	Effect
Cold	The target's speed is halved until the end of your next turn.
Fire	The target takes an extra 6 fire damage at the end of its next turn.
Lightning	The target can't take reactions until the end of your next turn.
Radiant	The next attack roll made against the target before the end of your next turn has advantage.