
You may pay {0} rather than pay the mana cost for Zombie creature spells you cast.
Rooftop Storm has 5 printings, first in Innistrad (2011). EDHREC ranks it #2,270 among Commander cards. It appears most in Wilhelt, the Rotcleaver decks (20,909 on EDHREC). 1 public deck on TCG runs it. It has 2 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.