Basic Actions like Reflecting and Draining, even if you drain Enemy Mana to increase Own HP by half the amount of received Mana for example, will be native operations to the whole System, and you can still have effects like “if you get damaged, a projectile corresponding to the damage you received, will spawn and fly wherever a random eligible target is”
Also fucking up the Combo by making the Spell have two Effects that do not actually correlate, is a mistake no matter how you look at it. What if you WANTED to do something that Adrenalizes your Mana UP and causes the Enemy Mana to go down due to something that is not related to actually draining the Enemy Mana, but actually destroying Enemy Mana while by sheer coincidence you also power up?