Hello, my nick is “Taruch”, I think I have found a bug.
So I had my standard math as Death Knight. Due to the game, I had played 4 mana 2/8 “Maw and Paw”, which gave me 15 extra HP.
Then I played 9 mana card "Fill my board with random undeads "
One of the undeads that summons was “screaming banshee”
Then I played 10 mana “Reno Lone Ranger” hero card.
And those undead minion summon another 15/15 minion.