Spell Siphon

You learn to draw upon the essence of living things in order to empower yourself. 

• As an action may touch a creature that has been dead for no longer than a minute. Make a successful arcana check against the dead creature's charisma score. You learn what spells it had prepared or could innately cast and may choose one to store in your mind. You may store a number of spells equal to your CON modifier and of a level no higher than your proficiency bonus. CON is your casting attribute for these spells. 
• You also learn to draw upon the potential life energy to augment your ability to store spells in your soul. When you attempt to store a spell of a level greater than your proficiency bonus you may expend and roll one of your hit die. For this instance you may store a spell of a level equal to your proficiency bonus plus half the number rolled.
• You may transfer a stored spell into a scroll, totem, book or surface using 50gp worth of silver and blood per level of the spell. You may cast these as if they were on your class spell list. Others may cast them following the normal rules for spell scrolls.