Vyke's Dragonbolt

You summon volatile red lightning to bolster your body and a weapon you hold, allowing it to spread within. For the duration, you become vulnerable to lightning damage and gain the following benefits:
One weapon you hold when you cast this spell becomes a magical weapon. It deals an extra 1d4 + your spellcasting ability modifier lightning damage when it hits.This benefit ends if you stop holding the weapon.
You count as one size larger when determining your carrying capacity, the weight you can push, drag, or lift, and creatures you can grapple.
Your speed increases by 5 feet.
At Higher Levels.
When you cast this spell using a spell slot of 6th level or higher, the extra damage increases to 2d4 + your spellcasting ability modifier.