Timed practice is an item purchasable in the Lingot Store.
Race against the countdown clock up to complete exercises. You begin with 30 seconds. Time gets added to the clock for each correct response you give. The practice ends when you complete all 20 of the exercises or run out of time. You earn 1 XP for each correct response. Once it's been purchased, it is accessible via either of the "Practice" buttons.
Store description: See how well you do practicing your skills against the clock in Timed Practice.
This practice tests your ability to respond to exercises quickly and accurately.
In the desktop use only the keyboard for a faster response.
Normally you won't be able to answer the exercise following a wrong answer, because you will run out of time.
Timed practice is available only via web, both in the desktop site and in the mobile site.