Rune of Puncturing

1st-level transmutation (brandish) (Artificer,Bard,Cleric,Paladin,Warlock,Wizard)

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• Casting Time: 1 action
• Range: Touch
• Components: V, S, M (A piercing melee weapon worth at least 1 gold)
• Duration: 10 minutes

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You place a magical rune on a weapon, increasing the sharpness of its point. When this weapon hits a creature, it scores a critical hit on a 19 or 20.

If this is your weapon, you may make a melee attack as a part of casting this spell.

​At Higher Levels​. If this spell is cast with a spell slot of a higher level than 1st, it increases the critical hit range by 1 for every two slot levels after the 2nd, so at 3rd-level the range is 18-20, at 5th-level 17-20, at 7th level 16-20, and at 9th level a critical hit occurs on a 15-20.