Magic shots seek out the Bloons, even behind cover.
Guided Magic is the first upgrade of Path 1 for the Wizard Monkey in BTD6. It allows the Wizard Monkey magic bolts to home in on bloons and bypass Line of Sight restrictions. It costs $125 on Easy, $150 on Medium, $160 on Hard, and $180 on Impoppable.
As of the Version 7.0 update, which decreases the base cost of the Wizard Monkey down to $450 on Medium, one 1-0-0 Wizard Monkey can be afforded on most difficulties with up to $650, except Impoppable Mode (unless with Monkey Knowledge "More Cash") and Half Cash.
Guided Magic is especially helpful on maps with high numbers of Line of Sight block obstacles such as Hedge or High Finance.
Guided Magic not only affects magic bolts, but it can affect Walls of Fire too by allowing them to bypass walls (though Walls of Fire still cannot be directed to a specific spot). Note that Guided Magic will not grant Dragon's Breath flames to pass through.