Promise of Loyalty is a rare Sorcery card from Magic: The Gathering (Magic Online Promos, PRM).
Rare
Magic Online Promos (PRM)
{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.
