Arterial Spear

Spend 1d6+5 HP which colesces in the form of blood into your hand or magical focus. You strench the blood out into a taught strand and fling it toward your target in a staight line using their spellcasting for the attack roll. If the attack hits it deals 2d6+3 Peircing damage. On a successful attack you may target another creature within range to target and strike with the spell, this hit is guaranteed. To cast this spell at higher levels you must sacrifice an additional d6 hp and can target an additional creature for each level.