The Tower of White:

During defensive battles, all units of the owner of this wonder gain +1 HP and +1 Morale. All desert hexes deal 1 additional damage to hostile armies during battles. All spells cast on the owner of the wonder or their defensive allies automatically gain a +4 bonus, but always magically malfunction, casters are always warned of this beforehand. A quarter of the cost of any spells that magically malfunction due to this, rounded up, are given to the owner of the wonder. This wonder has an upkeep of 1 of each resource available to the owner.