MArcomage

This would be the first common with a way of summoning a rare directly. I think commons shouldn't be able to so that. I suggest boosting it's attack and making it uncommon. The Idea itself is fun. There are to few cards to make non-keyword decks worthwhile.

True, it can summon a rare card directly, and it is common. But it seems pretty difficult to have an opponent (willingly) hold 7 or more keyword cards. If they have that, they are likely in good shape to defend themselves.

Additionally, it does very little if the opponent does not have 7 or more keyword cards - making it a common in this respect is actually a drawback to the card, not an advantage.

Still...I'll alter the card if this is the consensus.

I, too, think the condition is specific enough that the summoning effect is appropriate for a Common. It may even cause the player to hold onto it longer in hopes of a perfect situation, missing the opportunity entirely.

That being said, it is possible with a mere three cards for an opponent to have seven unique keywords.

Actually, you can do it with just two.

That's why is says "number of keyword cards" not "keywords." Maybe it should be re-worded to say "number of cards with keywords" for clarification. My purpose was that the opponent needs 7 or more separate cards with keywords to activate the Witcher summon ability.

Ah, I misunderstood.