Yes! Another way for Seekers to hand out a little hurt! They don''t want a lot, but with this and "I've got a plan!", you might be able to get by without potions or bows, especially if you are Ursula, who might well choose to just Dodge enemies except the few who would otherwise ruin her day. It's nice to be able to save the XP for other things.
As an additional cost to play Occult Invocation, discard up to 2 cards from your hand.
Fight. - This attack uses instead of . You get +1 and deal +1 damage for this attack for each card discarded as part of this card's cost.
This is a brutal card.
To make this card work you need a worthwhile card-engine. Seekers got that in spades! Grisly Totem or Feed the Mind or Cryptic Research or whatever other card draw you like will find you this, fill your hand with chaff, and you discard the chaff for great benefit on this card.
The attack is accurate and powerful, you typically hit at +7 or better which is a golden number both in Standard and Hard to ensure that the hits land, 3 damage will remove the vast majority of threats, although it'll leave some of the most tricky opponents in the game alive.
So long as you have any sort of sustained card draw in your deck, this card is great. And even when your card draw is so-so, this card is okay.