Well whatever, it was a 4/4 which is a solid side of beef so I tossed it into the deck.
Subconsciously my mind was nagging away at all that verbiage and then it hit me! Eureka!
What the card really means is: gain a +1 counter for each card you Delve.
Let me backtrack. Delve is a core mechanic for the current Magic expansion, a way of powering spells using trash in your graveyard instead of valuable mana. I had several really good cards which used Delve.
So we had one creature each, both the same size, then this happened:
This guy attacked:
|That's a lot of words to say +1 per card delved.|
This guy blocked him.
Then I cast this, using a card from the graveyard, giving my guy +1/+1 permanently plus +6/+6 temporarily.
So instead of trading creatures my 11/11 ate his poor monkey for breakfast.
After the fight I dropped this guy, for a permanent 11/11
I love this game!