Ok, it’s an expansion to an existing game which was published under Creative Commons.
I created an expansion to the call-and-response party game Cards Against Humanity based on the collectible card game Magic the Gathering.
As an expansion, it works exactly like Cards Against Humanity, and was designed to be similar in appearance, though distinct so as to not infringe upon CAH’s copyright. The set contains 100 new cards- 70 white response cards and 30 black call cards- the backs are printed with Cards Against the Multiverse, so while they will blend into the deck, they will be distinct. If this matters, CAH and CAtM cards will fit in standard card sleeves.