Oddities are a type of Trace that you’ll encounter on the map. Unlike other Traces, you don’t simply cast a spell to remove the Confoundable. Instead, you will need to engage in combat to remove the Confoundable in Oddity Traces. Similar to combat in Wizarding Challenges, you must attack the Confoundable and defend against their attacks. To attack, press the screen and use your finger to drag your wand’s target over the target icon. Once the meter is filled, cast the spell by tracing the glyph. 
To defend, drag your finger across the arrow that appears on your screen before the Foundable attacks. Successfully defending reduces the amount of damage you take. Use Potions 
to heal so you don’t run out of Stamina and lose the encounter. 
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Harry Potter: Wizards Unite Game GUIDE
哈利波特：巫師聯盟