The Jewel of Three Prayers

Whenever Equipped Creature attacks, put a
prayer counter on Jewel of Three Prayers.
Equipped creature gets +1/+1 for each
prayer counter on Jewel of Three Prayers. As
long as equipped creature has power 4 or greater
it gains vigilance. If it is 5 or greater, it gains
hexproof and lifelink. If it is 6 or greater, it gains protection from creatures.
Equip {3}