Weapon

Legendary Requires Attunement

This rose has a stem large enough to hold like the hilt of a weapon. You can concentrate on the rose using an action to cause it to grow one of the following weapons from its center: a dagger, shortsword, rapier, or whip. If the hilt already has a weapon growing from its center, the existing weapon withers away and disintegrates—allowing the new one to take its place.
You gain a +2 bonus to attack and damage rolls made with this magic weapon. In addition, targets hit by the the weapon take an extra 1d4 piercing damage. If you are proficient with simple or martial weapons or are a druid, you are considered proficient with the weapons that thornpiercer grows while you're attuned to it.

Each weapon option has a unique property with a save DC of 16:

Dagger. When you throw this weapon, only the blade is thrown from the rose hilt. Hit or miss, when the blade reaches its target, it erupts into a burst of thorns. The target and up to 3 other creatures of your choice within 10 feet of the target must succeed on a Dexterity saving throw or take 1d4+2 piercing damage. You can use a bonus action to cause the hilt to regrow the dagger blade.

Rapier. When you roll a 20 on an attack roll with this weapon, the blade's thorns eviscerate the inside of the target of the attack and deal an extra 3d4 piercing damage. If the target was a Large or smaller creature, it must make a Constitution saving throw. On a failure, its hit point maximum is reduced by the amount of damage dealt by the attack. On a success, it's reduced by half the amount instead. Once the creature completes a short or long rest, its hit point maximum is restored.

Shortsword. The first time you hit with an attack on your turn, the target of that attack must succeed on a Constitution saving throw or take an extra 1d6 poison damage and be poisoned until the end of its next turn.

Whip. When you hit with an attack with this weapon, you can choose to attempt to grapple the target if it's no more than one size larger than you. When you do, it must succeed on a Strength saving throw or become grappled by the thorned whip. While grappled, the targets takes an extra 1d4 piercing damage at the start of each of its turns. The target or another creature can use their action to reattempt the saving throw, releasing them upon a success. The whip snaps off from the hilt when you successfully grapple a creature with it, allowing you to move freely while the target is grappled. You can use a bonus action to cause the hilt to regrow the whip.

Every rose has its thorn. This one, in particular, will kill you.

Weight: 3lb