Weighty Chest (4e Ritual)
From D&D Wiki
The chest upon which you work this ritual becomes warded so that it is very difficult to move.
When you perform this ritual, you ward a single chest of up to medium size so that it becomes extremely heavy whenever a creature other than you attempts to move it. A creature can move the chest at half speed by making an Athletics check with a DC equal to the Arcana check you make when performing this ritual as a move action.