This was a mechanic from back in Saviors of Kamigawa, printed on only five cards in total
Almost any Cube that is on the fence about featuring some Disenchant effects should reach for Witch Enchanter, and frankly, thats a lot of Cubes
It shares many qualities with Force of Will while also having a better normal cost
You have to pay life for the card draw, and that means you need the Lifelink, and not just from this card, and you also need additional life gain in some of your other cards
You can expend these to create Flying Nalaar Aetherjet Token with Power and Toughness equal to the amount of Energy you expend
The static ability also hurts a surprisingly large number of common cards, including the very popular Etali, Primal Conqueror