T.A.Z.E. Mage Slayer

You have been trained in ancient techniques useful in melee combat against spellcasters, gaining the following benefits:

• When a creature within 5 feet of you casts a spell, you can use your reaction to make a melee weapon attack against that creature.
  • If the attack you make from this reaction hits, roll another d20.  On the new roll, if you roll a number greater than or equal to 20 - your wisdom modifier, you absorb the spell, stealing it from the caster and they lose their action.  You may then do one of three things on your next turn:
    • As an action, you may then spend ki points equal to the spell's level divided by 2, rounded up, to cast that spell at the level the caster intended.  Cantrips cast this way cost no ki points.  If the spell is a concentration spell, the spell only lasts until the start of your next turn.
    • As a bonus action, absorb the spell on your next turn, regaining ki points equal to the spell's level.
    • If none of the other two are chosen on your next turn, the spell dissipates as a free action.
• When you damage a creature that is concentrating on a spell, that creature has disadvantage on the saving throw it makes to maintain its concentration.
• You have advantage on saving throws against spells cast by creatures within 5 feet of you.