Yogg genereated an unknown card in my deck.

Hello there.

Just finished a match against a priest with Yogg-Saron and during the spellcasts, Yogg-Saron got hit by Treachery and defected to my side of the board, but continued casting, as he should. The weird thing is, that it created 3 'Shadows' in my deck, that summoned a new Yogg-Saron when drawn.

I drew the card, and it summoned a Yogg-Saron and then drew another card. It proceeded until I hit fatigue and two Yoggs where summoned in total, besides the one that had been given to me.

I have not seen this card before, and I cannot find it anywhere on any site. Anyone seen this before?

Sadly I did not record the actual play, but have a replay from : HSReplay.net

Ah yes, thats obviously the spell Yogg cast. Thanks for clearing that up.