Calamity of the Titans
Sorcery
As an additional cost to cast this spell, reveal a colorless creature card from your hand.
Exile each creature and planeswalker with mana value less than the revealed card's mana value.
Svetlin Velinov
Commander Masters (CMM)
• #745Rulings
The colorless creature card you reveal doesn't have to still be in your hand as Calamity of the Titans resolves. If it's not, use its mana value as it last existed in your hand.
(wotc • 2023-07-28)
The colorless creature card stays revealed until Calamity of the Titans leaves the stack.
(wotc • 2023-07-28)
Rulings
The colorless creature card you reveal doesn't have to still be in your hand as Calamity of the Titans resolves. If it's not, use its mana value as it last existed in your hand.
(wotc • 2023-07-28)
The colorless creature card stays revealed until Calamity of the Titans leaves the stack.
(wotc • 2023-07-28)