Looking for feedback on the follow custom item, which is intended as an auram vis catcher:
The Eye of the Sky
This item is fashioned from an Opal, a Semi-Precious Gem that was opened for 12 pawns of vis. This device was enchanted to capacity. Creating this device as is would take a minimum of 5 seasons, possibly more.
Effect #1: Understanding of the Airborn Device
Req: Auram, Mentem
R: Per, D: Sun, T: Ind
At its basic level, this effect allows the Eye of the Sky to use the following senses as well as an animate creature could: Sight, Hearing and Touch. These senses are enhanced in the following way: The Eye of the Sky may see in the dark as clearly as during daytime, and it may see as clearly in the distance as an eagle could (good enough to spot the movement of a small bird two miles away). Likewise, the sight for this item is not obfuscated by aerial phenomenas such as fog, smoke, airborn dust or cloud formations. As part of this effect, the Eye of the Sky gains very basic sentience in regards to its surroundings, enough to interpret danger from the senses it possesses, as well as remember geographic features it flies over in order to better calibrate its movement. Sight enables most of its movements and its vision-range powers, while touch and hearing were added as extra senses to better perceive danger from potentially camouflaged airborne entities, such as an air elemental.
Base 3, +2 for two additional sensory enhancements, +1 auram requisite, +1 mentem requisite, +2 Sun
Effect level 29 (25, +1 for two uses per day, +3 environmental trigger - sunrise/sunset). The opal confers +5 bonus to the lab total since this is an effect granting Sight, so the InIm(Au,Me) lab total to enchant in a season is 53.
Effect #2: Confer Locomotion
R: Per, D: Sun, T: Ind
This effect animates the Eye of the Sky which is then hurled through the sky at a speed equal to that of a very fast bird (about 20mph). The typical flight pattern follows this typical setup: Towards the sky until it reaches about two miles of altitude - high enough to allow for sight of most auram phenomenon above the ground. The Eye of the Sky will then move in a spiral pattern away from its point of origin - typically the covenant. After a day of flight, this spiral brings the enchanted item flying roughly 16 miles away from its point of origin. After two weeks of flight, the device is flying roughly 65 miles away from the central point, and will then again hurl itself towards the sky and start making its way back towards its origin - at a higher altitude this time. Should it detect danger in an area that seems to be directed at it, it will fly away from the danger until the danger has passed, at which point it will resume its normal flight pattern. Essentially, this allows the device, in a typical season, to scan the air within 65 miles of the covenant, at an altitude of up to 10 miles in height three times per season, provided there is someone to activate its flight capacity again after it comes back. Auram vis sources that are geographically located in that area are likely to be found and harvested, even if partilly mobile as auram vis is bound to be. Vis sources traveling on auram phenomenons such as clouds that can span entire regions may be hit or miss, depending on how close it traveled to the point of origin and the time of migration. At the end of a month of flight, this device will wait in the location from which it was launched until Confer Locomotion is activated again.
Base 3, +2 metal or gemstones, +2 Sun
Effect level 19(15, +1 for two uses per day, +3 for environmental trigger - sunrise/sunset and phases of the moon, to ensure the item comes back) The opal confers +4 bonus to the lab total since this is an effect to enable travel of the item, so the labtotal to enchant in a season is 34.
Effect #3: Locate Vis
R: Per, D: Sun, T: Vision
This effect allows the Eye of the Sky to detect vis at vision range. There is no penetration built into this effect, therefore this vision spell will not detect vis carried or part of a creature with magical resistance. The lack of penetration was intended to be a safety feature so it wouldn't seek out magical creatures. The linked trigger is also intended as a safety feature to prevent the device from randomly locating and harvesting vis that may be transported by grogs or companions on covenant ground while the device is inactive.
Base 1, +2 sun, +4 Vision
Effect level 19(15, +1 for two uses per day, +3 linked trigger - confer locomotion) The opal confers +5 bonus to the lab total since this is an effect granting Sight, so the labtotal to enchant in a season is 33.
Effect #4: Harvest Auram Vis
R: Sight, D: Mom, T: Ind
Built in with a linked trigger to its power "Locate Vis", this effect allows the Eye of the Sky to harvest vis its sight perceives. The sight range built into this effect, and the eagle distance vision, were intended to allow the item to gather the vis potentially from 2 miles from the source, thereby reducing both the need to fly towards the vis (which could be a problem if the vis is part of an auram phenomenon that is quicker than the device) as well as reducing any risk from proximity to potentially hostile auram elementals that might exist in an airborne magical aura generating auram vis. Fundamentally, there is nothing that limits this power to harvesting only auram vis despite the name. However, given the flight pattern of this device which is at high altitude, the vis detected by this spell would normally be in the air, the majority of which is likely to be auram vis. Due to the basic awareness built into the first effect in this item, the item will retain some understanding of where and when it harvested the vis. This vis is stored a small golden band that was bent arround the opal, but which is itself not enchanted in order to allow it to contain the vis - up to ten pawns. The vis is then typically harvested in the laboratory through vis transfer before the device is sent hurling back towards the sky again.
Base 10, +3 Sight
Effect level 30(25, +3 for Linked Trigger, +2 for up to 3 uses per day) The opal confers +5 bonus to the lab total since this is an effect at Sight range, so the labtotal to enchant in a season is 55.
Effect #5: You can't catch me, ah ah!
R: Per, D: Con, T: Ind
This effect has a linked trigger with Understanding of the Airborne Device, to enable the gem to become invisible when it perceives danger.
Base 4, +1 Conc, +1 moving image
Effect level 15 (10, +3 linked trigger, +2 for up to 3 uses per day) The opal confers +2 bonus to the lab total since this is an effect granting invisibility, so the labtotal to enchant in a season is 28.