Promise of Loyalty is a rare Sorcery card from Magic: The Gathering (March of the Machine Commander, MOC). Current market price: $0.31.
Rare
March of the Machine Commander (MOC)
{4}{W}
Mana Value
5
Colors
W
Card Text
Each player puts a vow counter on a creature they control and sacrifices the rest. Each of those creatures can't attack you or planeswalkers you control for as long as it has a vow counter on it.
