With Capacitor, Runic Capacitor or Inserter, this card can be very powerful. But be aware of your deck, as if your deck relies on channeled orbs to work you might want to save more orb slots and use other sources of Focus. However, if you rely on the continuous evoking of orbs, you can consume all your slots down to just one slot. This strategy works well with Chaos.
Consuming a slot that contains an orb will just remove the orb rather than evoking it.
It's notable that if you consume all your slots, you can no longer channel or evoke any orbs.
Consume is playable even when you have no orb slots left (and still gives you focus).