You gain a +2 bonus to attack and damage rolls made with this magic weapon.
This weapon has 3 forms. It's a Greatsword that can alter her shape to a long spear or a Maul. It takes an action to alter the weapon shape.
Each shape has a special attack, as listed below.
Maul: as an action, you can hurl the maul up to 45 meters. When it reach that point or on impact it explodes, causing 6d6 fire damage in a 6 meters radius (DEX 15 for half). You can spend an action to make the maul reapear on your hand.
Lance: Make an attack action to throw the lance up to 30 meters. It becomes a lightning helix, causing 5d8 lightning damage on impact. After the damage, you can heal yourself or an ally to half the damage. You can spend an action to make the spear reapear on your hand.
Great sword: with a bônus action, you can charge the blade of the sword with incandecent light. Your next attack will generate an blazing wave that will travel up to 9 meters, causing damage equal to the damage you caused (DEX 15 for half).
If you don’t call the weapon back to your hand, it reappears at the point where it exploded when you are no longer attuned to it or when 24 hours have passed
Proficiency with a Greatsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.
This weapon has the following mastery property. To use this property, you must have a feature that lets you use it.
Graze. If your attack roll with this weapon misses a creature, you can deal damage to that creature equal to the ability modifier you used to make the attack roll. This damage is the same type dealt by the weapon, and the damage can be increased only by increasing the ability modifier.
Notes: Bonus: Magic, Heavy, Two-Handed, Graze