Gruesome Menagerie
Sorcery
Choose a creature card with converted mana cost 1 in your graveyard, then do the same for creature cards with converted mana costs 2 and 3. Return those cards to the battlefield.
"Variety is also the spice of death." —Cevraya, Golgari shaman
Illustrated by
Guilds of Ravnica Promos#71sRareEnglishLegality
Rulings
Oct 5, 2018
Gruesome Menagerie doesn’t target the cards to return. You choose them while it’s resolving. No players may take actions between the time you make each choice and the time you return them to the battlefield.
Oct 5, 2018
If a card in your graveyard has 
in its mana cost, X is considered to be 0.
Oct 5, 2018
If you don’t have a creature card in your graveyard with one converted mana cost, you just continue on to the next.
Oct 5, 2018
All of the returned cards enter the battlefield at the same time.